Human Body Systems Flashcards: 11 Organ Systems, Organs & Functions
Study 105 cards on organization levels, 11 organ systems, representative organs, core functions, and homeostasis. This model counts integumentary separately and combines lymphatic/immune.
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Human Body Systems Flashcards: 11 Organ Systems, Organs & Functions
Build a practical overview of the human body before moving into regional anatomy. These 105 English flashcards start with cells, tissues, organs, organ systems, and homeostasis, then cover the main function and representative structures of each system.
The 11-system model
Anatomy resources do not all group the systems the same way. NCI SEER Training's introductory overview lists ten systems because it does not count the integumentary system separately. This deck uses a common introductory 11-system convention: integumentary; skeletal; muscular; nervous; endocrine; cardiovascular; lymphatic/immune; respiratory; digestive; urinary; and reproductive. It counts integumentary separately and combines lymphatic and immune functions.
What the cards practice
- Recall each system's main job.
- Connect representative organs and structures with their system or role.
- Use a limited set of bounded reverse prompts where producing the system or organ is genuinely useful.
- Explain a few clear homeostasis links, including movement, gas transport, fat absorption, temperature control, blood composition, sensation, and digestive propulsion.
The deck does not mechanically reverse every fact or treat shared organs as belonging exclusively to one system. The pancreas, gonads, diaphragm, skin, liver, and other cross-system structures are described by the role being reviewed.
Learning order
Organization levels come first. The cards then make repeated passes through all 11 systems: main functions before structures, and structures before selected reverse recall. Each system returns only after ten unrelated cards, so similar prompts do not cue one another. The final ten cards connect systems through homeostasis.
Scope
This is an introductory anatomy and physiology overview. It excludes diagnosis, treatment, clinical advice, detailed pathology, medical procedures, image-identification practice, exhaustive organ lists, and advanced pathway detail. It supports study but does not replace a full course, lab, or medical guidance.
Facts were checked primarily against the NCI SEER Training anatomy modules, with focused cross-checks from NIAMS on skin, NIAID on the immune system, and NIDDK overviews of digestion and the urinary tract.
The prompts, answers, sequence, metadata, and generated cover were independently created from common knowledge and original work. No competitor cards, textbook prose, source figures, logos, or third-party media were copied.
The Common knowledge · CC0 1.0 label applies to the original wording, organization, metadata, and cover to the extent applicable rights exist. It does not claim ownership of anatomical facts.
Source review date: August 31, 2026.
Targetes d'aquesta baralla
Targeta 1
Pregunta
Why can two anatomy resources give different counts for the body's organ systems?
Resposta
Classification conventions vary. This deck uses 11 systems by counting the integumentary system separately and combining lymphatic and immune functions.
Targeta 2
Pregunta
What is the usual order of biological organization from simplest to most complex in the human body?
Resposta
Cells → tissues → organs → organ systems → organism.
Targeta 3
Pregunta
What is a cell in the body's organization hierarchy?
Resposta
The basic living unit of the body.
Targeta 4
Pregunta
What is a tissue?
Resposta
A group of similar cells, together with their surrounding material, organized to perform a shared function.
Targeta 5
Pregunta
What is an organ?
Resposta
A structure made of multiple tissue types working together for one or more specific functions.
Targeta 6
Pregunta
What is an organ system?
Resposta
A group of organs and related structures that cooperate in major body functions.
Targeta 7
Pregunta
What does homeostasis mean in introductory physiology?
Resposta
Maintaining a relatively stable internal environment while conditions inside or outside the body change.
Targeta 8
Pregunta
What is the integumentary system's main job?
Resposta
It forms the body's outer barrier, limits water loss, helps regulate temperature, and provides sensation.
Targeta 9
Pregunta
What are the skeletal system's main jobs?
Resposta
Support and protect the body, provide levers for movement, store minerals, and house blood-forming marrow.
Targeta 10
Pregunta
What is the muscular system's main job?
Resposta
It produces body movement through muscle contraction and also supports posture, joint stability, and heat production.
Targeta 11
Pregunta
What is the nervous system's main job?
Resposta
It detects changes, integrates information, and coordinates rapid responses through sensory, processing, and motor activity.
Targeta 12
Pregunta
What is the endocrine system's main job?
Resposta
It uses hormones to regulate processes such as growth, metabolism, development, reproduction, and long-term homeostasis.
Targeta 13
Pregunta
What is the cardiovascular system's main job?
Resposta
It circulates blood to transport gases, nutrients, hormones, heat, cells, and wastes around the body.
Targeta 14
Pregunta
What are the lymphatic/immune system's main jobs in this deck's combined model?
Resposta
It returns excess tissue fluid to the blood, supports immune defense, and carries absorbed fats from the small intestine.
Targeta 15
Pregunta
What is the respiratory system's main job?
Resposta
It brings oxygen into contact with the blood and removes carbon dioxide through gas exchange.
Targeta 16
Pregunta
What is the digestive system's main job?
Resposta
It breaks food into absorbable components, absorbs nutrients and water, and eliminates material that was not digested.
Targeta 17
Pregunta
What is the urinary system's main job?
Resposta
It removes wastes in urine and regulates body-fluid volume, electrolytes, and acid-base balance.
Targeta 18
Pregunta
What is the reproductive system's main job?
Resposta
It produces gametes and reproductive hormones and provides structures that support fertilization and, in the female system, development before birth.
Targeta 19
Pregunta
Which organ system includes the skin?
Resposta
The integumentary system.
Targeta 20
Pregunta
Which organ system includes bones?
Resposta
The skeletal system.
Targeta 21
Pregunta
In the conventional organ-system model, what structures make up the muscular system?
Resposta
Primarily skeletal muscles and their associated tendons. Smooth and cardiac muscle tissue also drives movement inside other organ systems.
Targeta 22
Pregunta
Which structures make up the central nervous system?
Resposta
The brain and spinal cord.
Targeta 23
Pregunta
How do endocrine glands release hormones?
Resposta
They release hormones into the surrounding fluid and blood rather than through ducts to a surface.
Targeta 24
Pregunta
What does the heart do in the cardiovascular system?
Resposta
It pumps blood through the pulmonary and systemic circuits.
Targeta 25
Pregunta
What is lymph?
Resposta
Interstitial fluid after it enters lymphatic capillaries and begins moving through lymphatic vessels.
Targeta 26
Pregunta
What route does inhaled air follow from the nose toward the gas-exchange surfaces?
Resposta
Nasal cavity → pharynx → larynx → trachea → bronchi → smaller airways → alveoli.
Targeta 27
Pregunta
What is the gastrointestinal tract?
Resposta
A continuous muscular tube from the mouth to the anus that includes the esophagus, stomach, small intestine, and large intestine.
Targeta 28
Pregunta
Which four structures form the urinary tract?
Resposta
The kidneys, ureters, urinary bladder, and urethra.
Targeta 29
Pregunta
What are the gonads, and what do they produce?
Resposta
The ovaries and testes. They produce gametes and reproductive hormones.
Targeta 30
Pregunta
Which skin layer is the outer protective barrier?
Resposta
The epidermis.
Targeta 31
Pregunta
What is cartilage's main role in the skeletal system?
Resposta
It provides flexible support and smooth, low-friction surfaces at many joints.
Targeta 32
Pregunta
What does a tendon connect?
Resposta
Muscle to bone.
Targeta 33
Pregunta
What structures make up the peripheral nervous system?
Resposta
Nerves, ganglia, and sensory endings outside the brain and spinal cord.
Targeta 34
Pregunta
What is the pituitary gland's broad endocrine role?
Resposta
It releases hormones that regulate several other endocrine glands and body functions.
Targeta 35
Pregunta
In what direction do arteries carry blood?
Resposta
Away from the heart.
Targeta 36
Pregunta
What do lymph nodes do?
Resposta
They filter lymph and serve as meeting points where immune cells sample material and coordinate responses.
Targeta 37
Pregunta
What are alveoli?
Resposta
Tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged with the blood.
Targeta 38
Pregunta
What is the esophagus's digestive role?
Resposta
It transports swallowed material from the pharynx to the stomach.
Targeta 39
Pregunta
What do the kidneys do?
Resposta
They filter blood, remove wastes and excess substances into urine, and regulate water, electrolytes, and acid-base balance.
Targeta 40
Pregunta
What do the ovaries produce?
Resposta
Oocytes, commonly called egg cells, and hormones including estrogens and progesterone.
Targeta 41
Pregunta
Which skin layer contains most skin blood vessels, sensory endings, hair follicles, and glands?
Resposta
The dermis.
Targeta 42
Pregunta
What does a ligament connect?
Resposta
Bone to bone, helping stabilize a joint.
Targeta 43
Pregunta
What makes skeletal muscle suited for moving the skeleton?
Resposta
It contracts under voluntary control and pulls on bones through tendons.
Targeta 44
Pregunta
What do sensory receptors contribute to the nervous system?
Resposta
They detect changes inside or outside the body and convert them into signals the nervous system can process.
Targeta 45
Pregunta
What is the thyroid gland's broad endocrine role?
Resposta
It releases hormones that help regulate metabolic rate, growth, and development.
Targeta 46
Pregunta
In what direction do veins carry blood?
Resposta
Toward the heart.
Targeta 47
Pregunta
What is the spleen's lymphatic/immune role?
Resposta
It filters blood, removes aging blood cells, and supports immune responses to material carried in the bloodstream.
Targeta 48
Pregunta
What is the trachea's respiratory role?
Resposta
It conducts air from the larynx toward the bronchi and helps keep the airway open.
Targeta 49
Pregunta
What is the stomach's main digestive role?
Resposta
It stores and mixes food while beginning substantial chemical digestion of proteins.
Targeta 50
Pregunta
What do the ureters do?
Resposta
They carry urine from the kidneys to the urinary bladder.
Targeta 51
Pregunta
What do the testes produce?
Resposta
Sperm cells and hormones, especially testosterone.
Targeta 52
Pregunta
How do sweat glands help regulate body temperature?
Resposta
They release sweat; evaporation from the skin removes heat.
Targeta 53
Pregunta
What is red bone marrow's main role?
Resposta
It produces blood cells, including red blood cells, many white blood cells, and platelets.
105 targetes
Human Body Systems Flashcards: 11 Organ Systems, Organs & Functions
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Targeta 54
Pregunta
What does smooth muscle do in the walls of hollow organs and blood vessels?
Resposta
Its involuntary contractions move contents through organs or adjust a vessel's diameter.
Targeta 55
Pregunta
What is a neuron's basic job?
Resposta
To receive, process, and transmit information using electrical and chemical signals.
Targeta 56
Pregunta
What is the broad endocrine role of the parathyroid glands?
Resposta
They release parathyroid hormone, a key regulator of calcium levels in the blood.
Targeta 57
Pregunta
What is the main job of capillaries?
Resposta
They provide thin-walled exchange sites between blood and surrounding tissues.
Targeta 58
Pregunta
What is the thymus's immune role?
Resposta
It is where T lymphocytes mature.
Targeta 59
Pregunta
What do the bronchi do?
Resposta
They carry air from the trachea into the lungs and branch into progressively smaller airways.
Targeta 60
Pregunta
What is the small intestine's main digestive role?
Resposta
It completes most chemical digestion and is the main site where nutrients are absorbed.
Targeta 61
Pregunta
What is the urinary bladder's main role?
Resposta
It stores urine until urination.
Targeta 62
Pregunta
What do the uterine tubes do?
Resposta
They transport an oocyte from an ovary toward the uterus and are the usual site of fertilization.
Targeta 63
Pregunta
What roles do hair and hair follicles serve in the integumentary system?
Resposta
They contribute to protection and sensation; follicles also help renew skin after minor injury.
Targeta 64
Pregunta
How do the axial and appendicular skeletons differ?
Resposta
The axial skeleton forms the body's central axis; the appendicular skeleton includes the limbs and the girdles that attach them.
Targeta 65
Pregunta
Where is cardiac muscle found?
Resposta
In the wall of the heart, where it contracts involuntarily to pump blood.
Targeta 66
Pregunta
Why can the nervous system coordinate rapid responses?
Resposta
It sends fast electrical signals along neurons and uses chemical signals across synapses.
Targeta 67
Pregunta
What is the broad endocrine role of the adrenal glands?
Resposta
They release hormones involved in stress responses, metabolism, salt balance, and blood-pressure regulation.
Targeta 68
Pregunta
Why is blood considered part of the cardiovascular system?
Resposta
It is the circulating transport tissue moved through the heart and blood vessels.
Targeta 69
Pregunta
What immune role do the tonsils serve?
Resposta
They sample material entering through the mouth and nose and help start immune responses.
Targeta 70
Pregunta
How does the diaphragm support the respiratory system?
Resposta
Its contraction enlarges the thoracic cavity, drawing air into the lungs. It is skeletal muscle working in ventilation.
Targeta 71
Pregunta
What is the large intestine's main digestive role?
Resposta
It absorbs water and electrolytes and compacts the remaining material into feces.
Targeta 72
Pregunta
What does the urethra do?
Resposta
It carries urine from the bladder to the outside of the body.
Targeta 73
Pregunta
What is the uterus's main reproductive role?
Resposta
It receives an implanted embryo and supports development before birth.
Targeta 74
Pregunta
What do nails contribute to the integumentary system?
Resposta
They protect the tips of fingers and toes and provide a firm counter-surface for fine grasping.
Targeta 75
Pregunta
Which skeletal structures protect the brain, spinal cord, heart, and lungs?
Resposta
The skull protects the brain, vertebrae protect the spinal cord, and the rib cage helps protect the heart and lungs.
Targeta 76
Pregunta
How does skeletal muscle contribute to posture and body temperature?
Resposta
Ongoing small contractions stabilize posture, while muscle activity releases heat.
Targeta 77
Pregunta
How do the central and peripheral nervous systems differ?
Resposta
The central nervous system is the brain and spinal cord; the peripheral system connects them with the rest of the body.
Targeta 78
Pregunta
What do the pancreatic islets contribute to the endocrine system?
Resposta
They release hormones, including insulin and glucagon, that help regulate blood glucose.
Targeta 79
Pregunta
How do pulmonary and systemic circulation differ?
Resposta
Pulmonary circulation moves blood between the heart and lungs; systemic circulation moves it between the heart and the rest of the body.
Targeta 80
Pregunta
What do intestinal lacteals absorb?
Resposta
Dietary fats and fat-soluble vitamins from the small intestine into the lymphatic circulation.
Targeta 81
Pregunta
What is external respiration?
Resposta
The exchange of oxygen and carbon dioxide between air in the lungs and blood in pulmonary capillaries.
Targeta 82
Pregunta
Which major accessory organs add secretions to the digestive tract?
Resposta
The salivary glands, liver, gallbladder, and pancreas.
Targeta 83
Pregunta
How do the kidneys help keep body fluids stable?
Resposta
They adjust how much water, electrolytes, acids, and bases leave the body in urine.
Targeta 84
Pregunta
What is the epididymis's reproductive role?
Resposta
It is the coiled duct where sperm mature and are stored before entering the ductus deferens.
Targeta 85
Pregunta
Which organ system includes hair, nails, sweat glands, and oil glands?
Resposta
The integumentary system.
Targeta 86
Pregunta
Which organ system stores most of the body's calcium?
Resposta
The skeletal system, mainly in the mineral matrix of bone.
Targeta 87
Pregunta
Which organ system produces most visible body movement through contraction?
Resposta
The muscular system, working with the skeleton and nervous system.
Targeta 88
Pregunta
Which organ system coordinates rapid sensory and motor responses?
Resposta
The nervous system.
Targeta 89
Pregunta
Which organs have both reproductive and endocrine roles?
Resposta
The ovaries and testes: they produce gametes for the reproductive system and hormones for endocrine signaling.
Targeta 90
Pregunta
Which organ system consists of the heart, blood, and a closed network of vessels?
Resposta
The cardiovascular system.
Targeta 91
Pregunta
Which organ system returns excess interstitial fluid to the blood and includes lymph nodes?
Resposta
The lymphatic/immune system.
Targeta 92
Pregunta
Which organ system removes carbon dioxide and thereby helps regulate blood pH?
Resposta
The respiratory system.
Targeta 93
Pregunta
Why are the liver, gallbladder, and pancreas called accessory digestive organs?
Resposta
Food does not pass through them, but their secretions support digestion in the gastrointestinal tract.
Targeta 94
Pregunta
Which urinary organ stores urine before it leaves the body?
Resposta
The urinary bladder.
Targeta 95
Pregunta
Which reproductive organ supports an implanted embryo and fetal development?
Resposta
The uterus.
Targeta 96
Pregunta
How do the skeletal and muscular systems work together to produce movement?
Resposta
Skeletal muscles contract and pull on bones, which act as levers across joints.
Targeta 97
Pregunta
How do the respiratory and cardiovascular systems cooperate in gas transport?
Resposta
The respiratory system exchanges gases in the lungs; the cardiovascular system carries oxygen to tissues and returns carbon dioxide to the lungs.
Targeta 98
Pregunta
How do the nervous and endocrine systems differ in body control?
Resposta
The nervous system usually sends fast, targeted signals; the endocrine system sends hormones through the blood for generally slower, longer-lasting effects.
Targeta 99
Pregunta
How do the digestive and lymphatic systems cooperate in fat absorption?
Resposta
Lacteals in small-intestinal villi absorb dietary fats and carry them into the lymphatic circulation.
Targeta 100
Pregunta
How do the integumentary and muscular systems help regulate body temperature?
Resposta
Skin promotes heat loss through sweating and blood-flow changes, while muscle contraction produces heat.
Targeta 101
Pregunta
How does the urinary system support cardiovascular homeostasis?
Resposta
By adjusting water and electrolyte excretion, the kidneys help regulate blood volume, composition, and pressure.
Targeta 102
Pregunta
How do the endocrine and reproductive systems cooperate?
Resposta
Hormones regulate reproductive development and function, while the gonads produce both gametes and hormones.
Targeta 103
Pregunta
How do the skeletal and lymphatic/immune systems connect through bone marrow?
Resposta
Red bone marrow produces blood cells, including white blood cells that take part in immune defense.
Targeta 104
Pregunta
How do the integumentary and nervous systems cooperate in sensation?
Resposta
Receptors in the skin detect touch, temperature, pressure, and potentially harmful stimuli, then sensory nerves carry those signals toward the central nervous system.
Targeta 105
Pregunta
How do the muscular and digestive systems cooperate to move food?
Resposta
Smooth muscle in the digestive tract produces coordinated contractions that propel and mix its contents.
105 targetes
Human Body Systems Flashcards: 11 Organ Systems, Organs & Functions
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