Vocab Things for Anatomical Overview

Glossary

A

• Abdominal cavity – The body cavity containing the stomach, intestines, liverA large organ that produces bile, detoxifies blood, and stores nutrients., and other digestive organs.
• Anatomical position – A standard reference position where the body stands upright, facing forward, with arms at the sides and palms facing forward.
• Anatomy – The study of the structure of the human body.
• Anterior – The front of the body or toward the front.
• Atoms – The smallest units of matter that retain the properties of an element.

C

• Cardiovascular System – The organ system that includes the heart and blood vessels, responsible for circulating blood and oxygen.
• Cells – The basicA solution with a pH above 7, having a lower concentration of H⁺ ions. structural and functional units of life.
• Cellular composition – The characteristic of living things being made up of cellsThe basic structural and functional units of life..
• Concentration gradient – A difference in the concentration of a substance across a space.
• Control group – A group in an experiment that does not receive the treatment and is used for comparison.
• Controls – Variables that remain constant to ensure a fair test.
• Cranial cavity – The body cavity that houses the brain.

D

• Deep – Away from the surface of the body.
• Development – The process of growthAn increase in size and number of cells. and differentiation.
• Digestive System – The organ system responsible for breaking down food and absorbing nutrients.
• Distal – Farther from the point of attachment or origin.
• Dorsal – Relating to the back side of the body.
• Double-blind method – An experiment where neither the participants nor the researchers know who is receiving the treatment to reduce bias.
• Down the gradient – Movement from an area of higher concentration to lower concentration.

E

• Effector – A structure that responds to a stimulus, such as a muscle or gland.
• Electrical gradient – A difference in electrical charge across a membrane.
• Electrochemical gradient – The combination of concentration and electrical gradients that drive ion movementA fundamental property of life involving motion of the body or its parts..
• Endocrine System – The organ system consisting of glands that secrete hormones to regulate body functions.
• Evolution – The process of change in living organisms over generations.

F

• Fact – A statement based on direct observation that is repeatedly confirmed.
• Falsifiability – The principle that a hypothesis must be testable and capable of being proven false.
• Feedback loops – Biological mechanisms that regulate homeostasisThe maintenance of a stable internal environment in the body. by responding to changes.
• Frontal plane – A vertical plane that divides the body into front and back sections.

G

• Gradient – A difference in a particular variable (e.g., concentration, pressureThe force exerted by gases in the respiratory system, affecting airflow and gas exchange.) across a space.
• Growth – An increase in size and number of cells.

H

• Histology – The microscopic study of tissues.
• Holism – The theoryA well-tested and widely accepted explanation. that systems should be studied as wholes, not just as individual parts.
• Homeostasis – The maintenance of a stable internal environment in the body.
• Hypothetico-deductive method – A scientific approach that starts with a hypothesis and tests it through experiments.

I

• Inductive method – A scientific approach based on observation and generalization.
• Inferior – Below or toward the lower part of the body.
• Integrating (control) center – The part of a feedback loop that processes information and initiates a response.
• Integumentary System – The organ system that includes the skinThe body’s largest organ, providing protection and regulation., hair, and nailsHard, keratinized structures that protect the fingertips and enhance fine motor skills., providing protection.

L

• Lateral – Away from the midline of the body.
• Law of nature – A generalization about the behavior of nature based on repeated observations.
• Lumen – The inside space of a hollow organ or structure.
• Lymphatic System – The organ system that returns fluid to the bloodstream and provides immune responses.

M

• Medial – Toward the midline of the body.
• Mesentery – A membrane that anchors the intestines and supplies them with blood vessels.
• Metabolism – The sum of all chemical reactions in the body.
• Molecules – Groups of atomsThe smallest units of matter that retain the properties of an element. bonded together, forming chemical substances.
• Movement – A fundamental property of life involving motion of the body or its parts.
• Muscular System – The organ system responsible for movement and heat production.

N

• Negative feedback – A control mechanism that reverses a change in the body to maintain homeostasis.
• Nervous System – The organ system that controlsVariables that remain constant to ensure a fair test. body functions using electrical and chemical signals.

O

• Opposable – The ability of the thumb to touch the fingertips, allowing grasping.
• Organ systems – Groups of organs that work together to perform functions.
• Organelles – Structures within a cell that perform specialized functions.
• Organism – A living individual made up of cells.
• Organization – The structured arrangement of biological systems.

P

• Peer reviews – Evaluation of scientific work by experts in the field.
• Pelvic cavity – The body cavity that houses the reproductive organs and bladderA muscular organ that stores urine before excretion..
• Pericardium – The membrane surrounding the heart.
• Peritoneum – The membrane lining the abdominal cavityThe body cavity containing the stomach, intestines, liver, and other digestive organs. and organs.
• Physiology – The study of how the body functions.
• Placebo – A substance with no therapeutic effect used in control groups.
• Pleura – The membrane surrounding the lungs.
• Positive feedback – A control mechanism that amplifies a change instead of reversing it.
• Posterior – The back of the body or toward the back.
• Prefix – A word part added at the beginning of a term to modify its meaning.
• Prehensile – Adapted for grasping, as in primate hands.
• Pressure gradient – The difference in pressure between two areas.
• Proximal – Closer to the point of attachment or origin.

R

• Receptor – A structure that detects stimuliChanges in the environment that are detected by sensory receptors..
• Reductionism – The idea that complex systems can be understood by studying their parts.
• Reproduction – The process of producing offspring.
• Reproductive System – The organ system responsible for producing gametes and offspring.
• Respiratory System – The organ system responsible for gas exchange (oxygen and carbon dioxide).
• Responsiveness – The ability to detect and react to stimuli.

S

• Sagittal plane – A vertical plane dividing the body into left and right sections.
• Sample size – The number of subjects in a study or experiment.
• Scientific method – A systematic approach to investigation using hypothesis testing.
• Section – A cut or slice of the body or an organ for study.
• Serous membranes – Thin tissues that line body cavities and secrete fluid.
• Skeletal System – The organ system providing structure and support.
• Statistical testing – Methods used to analyze data and determine significance.
• Stereoscopic – Depth perception due to overlapping visual fields.
• Stimuli – Environmental factors that cause a response.
• Suffix – A word part added to the end of a term to modify its meaning.
• Superficial – Near the surface of the body.
• Superior – Above or toward the upper part of the body.

T-U-V

• Theory – A well-tested and widely accepted explanation.
• Thermal gradient – A difference in temperature between two areas.
• Thoracic cavity – The body cavity housing the heart and lungs.
• Tissues – Groups of similar cells performing a function.
• Transverse plane – A horizontal plane dividing the body into upper and lower parts.
• Up the gradient – Movement from lower to higher concentration.
• Urinary System – The organ system that removes waste and maintains fluid balanceThe maintenance of proper fluid volume and distribution in the body..
• Ventral – Relating to the front or belly side of the body.