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