Browse categories
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Anatomy
1,049 questions A branch of biology dealing with the structure of organisms.
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Body Regions
36 questions Anatomical areas of the body.
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Musculoskeletal System
53 questions The MUSCLES, bones (BONE AND BONES), and CARTILAGE of the body.
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Digestive System
23 questions A group of organs stretching from the MOUTH to the ANUS, serving to breakdown foods, assimilate nutrients, and eliminate waste. In humans, the digestive system includes the GASTROINTESTINAL TRACT and the accessory glands (LIVER; BILIARY TRACT; PANCREAS).
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Respiratory System
12 questions The tubular and cavernous organs and structures, by means of which pulmonary ventilation and gas exchange between ambient air and the blood are brought about.
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Urogenital System
25 questions All the organs involved in reproduction and the formation and release of URINE. It includes the kidneys, ureters, BLADDER; URETHRA, and the organs of reproduction - ovaries, UTERUS; FALLOPIAN TUBES; VAGINA; and CLITORIS in women and the testes; SEMINAL VESICLES; PROSTATE; seminal ducts; and PENIS in men.
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Endocrine System
6 questions The system of glands that release their secretions (hormones) directly into the circulatory system. In addition to the ENDOCRINE GLANDS, included are the CHROMAFFIN SYSTEM and the NEUROSECRETORY SYSTEMS.
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Cardiovascular System
24 questions The HEART and the BLOOD VESSELS by which BLOOD is pumped and circulated through the body.
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Nervous System
27 questions The entire nerve apparatus, composed of a central part, the brain and spinal cord, and a peripheral part, the cranial and spinal nerves, autonomic ganglia, and plexuses. (Stedman, 26th ed)
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Sense Organs
5 questions
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Tissues
11 questions Collections of differentiated CELLS, such as EPITHELIUM; CONNECTIVE TISSUE; MUSCLES; and NERVE TISSUE. Tissues are cooperatively arranged to form organs with specialized functions such as RESPIRATION; DIGESTION; REPRODUCTION; MOVEMENT; and others.
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Cells
62 questions The fundamental, structural, and functional units or subunits of living organisms. They are composed of CYTOPLASM containing various ORGANELLES and a CELL MEMBRANE boundary.
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Fluids and Secretions
12 questions Liquid substances produced by living organisms to fulfill specific functions or excreted as waste.
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Animal Structures
4 questions Organs and other anatomical structures of non-human vertebrate and invertebrate animals.
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Stomatognathic System
1 question The mouth, teeth, jaws, pharynx, and related structures as they relate to mastication, deglutition, and speech.
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Hemic and Immune Systems
3 questions Organs involved in the production of BLOOD, including the cellular and the molecular components essential in providing defense against foreign organisms or substances.
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Embryonic Structures
7 questions The anatomical parts that make up an organism in the early stages of development.
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Integumentary System
3 questions The outer covering of the body composed of the SKIN and the skin appendages, which are the HAIR, the NAILS; and the SEBACEOUS GLANDS and the SWEAT GLANDS and their ducts.
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Plant Structures
2 questions The parts of plants, including SEEDS.
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Fungal Structures
0 questions The parts of fungi.
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Bacterial Structures
3 questions The parts of bacteria.
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Viral Structures
4 questions The structural parts of the VIRION.
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Organisms
388 questions Any living biological entity, such as an animal, plant, fungus, or bacterium.
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Diseases
1,356 questions Any impairment of normal physiological function affecting all or part of an organism, esp a specific pathological change caused by infection, stress, etc, producing characteristic symptoms; illness or sickness in general.
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Chemicals and Drugs
853 questions Any substance used in or resulting from a reaction involving changes to atoms or molecules, especially one derived artificially for practical use and any synthetic, semisynthetic, or natural chemical substance used in the treatment, prevention, or diagnosis of disease, or for other medical reasons.
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Analytical, Diagnostic and Therapeutic Techniques and Equipment
359 questions
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Psychiatry and Psychology
162 questions The branches of medicine concerned with the diagnosis and treatment of mental illness and the scientific study of all forms of human and animal behaviour, sometimes concerned with the methods through which behaviour can be modified.
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Phenomena and Processes
97 questions
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Disciplines and Occupations
28 questions
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Anthropology, Education, Sociology and Social Phenomena
98 questions
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Technology, Industry, Agriculture
84 questions
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Humanities
80 questions The study of literature, philosophy, and the arts.
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Information Science
219 questions The field of knowledge, theory, and technology dealing with the collection of facts and figures, and the processes and methods involved in their manipulation, storage, dissemination, publication, and retrieval. It includes the fields of COMMUNICATION; PUBLISHING; LIBRARY SCIENCE; and informatics.
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Named Groups
38 questions
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Health Care
1,260 questions
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Publication Characteristics
30 questions
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Geographicals
23 questions The study of the natural features of the earth's surface, including topography, climate, soil, vegetation, etc, and man's response to them.
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