Chapter 1 - An Introduction to the Human Body Flashcards
Abdominopelvic cavity
Division of the anterior (ventral) cavity that houses the abdominal and pelvic viscera
Anabolism
Assembly of more complex molecules from simpler molecules
Anatomical position
Standard reference position used for describing locations and directions on the human body
Anatomy
Science that studies the form and composition of the body’s structures
Anterior
Describes the front or direction toward the front of the body; also referred to as ventral
Anterior cavity
Larger body cavity located anterior to the posterior (dorsal) body cavity; includes the serous membrane-lined pleural cavities for the lungs, pericardial cavity for the heart, and peritoneal cavity for the abdominal and pelvic organs; also referred to as ventral cavity
Catabolism
Breaking down of more complex molecules into simpler molecules
Caudal
Describes a position below or lower than another part of the body proper; near or toward the tail (in humans, the coccyx, or lowers part of the spinal column); also referred to as inferior
Cell
Smallest independently functioning unit of all organisms; in animals, a cell contains cytoplasm, composed of fluid and organelles
Computed tomography (CT)
Medical imaging technique in which a computer-enhanced cross-sectional X-ray image is obtained
Control Center
Compares values to their normal range; deviations cause the activation of an effector
Cranial
Describes a position above or higher than another part of the body proper; also referred to as superior
Cranial cavity
Division of the posterior (dorsal) cavity that houses the brain
Deep
Describes a position farther from the surface of the body
Development
Changes an organism goes through during its life
Differentiation
Process by which unspecialized cells become specialized in structure and function
Distal
Describes a position farther from the point of attachment or the trunk of the body
Dorsal
Describes the back or direction toward the back of the body; also referred to as posterior
Dorsal cavity
Posterior body cavity that houses the brain and spinal cord; also referred to as the posterior body cavity
Effector
Organ that can cause a change in a value
Frontal plan
Two-dimensional, vertical plan that divides the body or organ into anterior and posterior portions
Gross anatomy
study of the larger structures of the body, typically with the unaided eye; also referred to as macroscopic anatomy
Growth
Process of increasing in size
Homeostasis
Steady state of body systems that living organisms maintain
Inferior
Describes a position below or lower than another part of the body proper; near or toward the tail (in humans, the coccyx, or lowest part of the spinal column); also referred to as caudal
Lateral
Describes the side or direction toward the side of the body
Magnetic Resonance Imaging (MRI)
Medical imaging technique in which a device generates a magnetic field to obtain detailed sectional images of the internal structures of the body
Medial
Describes the middle or direction toward the middle of the body
Metabolism
Sum of all the body’s chemical reactions
Microscopic anatomy
Study of very small structures of the body using magnification
Negative feedback
Homeostasis mechanism that tends to stabilize an upset in the body’s physiological condition by preventing an excessive response to a stimulus, typically as the stimulus is removed
Normal range
Range of values around the set point that do not cause a reaction by the control center
Nutrient
Chemical obtained from foods and beverages that is critical to human survival
Organ
Functionally distinct structure composed of two or more types of tissues
Organ system
Group of organs that work together to carry out a particular function
Organism
Living being that has a cellular structure and that can independently perform all physiological functions necessary for life
Pericardium
Sac that encloses the heart
Peritoneum
Serous membrane that lines the abdominopelvic cavity and covers the organs found there
Physiology
Science that studies the chemistry, biochemistry, and physics of the body’s functions
Plane
Imaginary two-dimensional surface that passes through the body
Pleura
Serous membrane that lines the pleural cavity and coves the lungs
Positive Feedback
Mechanisms that intensifies a change in the body’s physiological condition in response to a stimulus
Positron emission tomography (PET)
Medical imaging technique in which radiopharmaceuticals are traced to reveal metabolic and physiological functions in tissues