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Chapter 1
Organization, Characteristics of Life, etc.
26
Anatomy
12th Grade
11/11/2008

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Term
Organ
Definition
Composed of 2 or more tissue types that perform on common function together
Term
Cell
Definition
Basic structural & functional unit of organisms
Term
Organelles
Definition
Small structures that make up cells
Term
Organism
Definition
Any living thing considered as a whole, one cell or more
Term
Organ System
Definition
Group of organs classified as a unit b/c of a common function or set of functions
Term
Chemical
Definition
Level of organization involves interactions among atoms & their combos into molecules
Term
Tissue
Definition
A group of similar cells & materials surrounding
Term
Levels of Organization (in order)
Definition
Chemical, Organelle, Cell, Tissue, Organ, Organ System, Organism
Term
(Characteristics of Life)
Organization
Definition
Parts of an organism have specific relationships to e/o & parts interact to perform specific functions
Term
(Characteristics of Life)
Metabolism
Definition
Ability to use energy to perform vital functions (i.e. growth, movement, reproduction...)
Term
(Characteristics of Life)
Responsiveness
Definition
Ability of an organism to sense changes in the environment & help maintain its life
Term
(Characteristics of Life)
Growth
Definition
Increase in size of all or part of the organism
Term
(Characteristics of Life)
Development
Definition
Changes an organism undergoes through time (womb-tomb)
Term
(Characteristics of Life)
Reproduction
Definition
Formation of new cells or new organisms
Term
Anatomic Imaging
Definition
Pictures of internal structures using x-rays, MRI, ultrasound, etc.
Term
Surface Anatomy
Definition
Study of external features
Term
Regional Anatomy
Definition
Study of the organization of the body by areas
Term
Systemic Anatomy
Definition
Study of body by systems
Term
Positive Feedback Mechanisms
Definition
NOT homeostatic, rare in healthy individuals, makes deviation from set point greater, can be fatal
Term
Negative Feedback Mechanisms
Definition
Regulates body, any deviation from set point made smaller or resisted
Term
Set Point
Definition
Ideal or normal value
Term
(Negative Feedback Mechanisms)
Effector
Definition
Can change value of variable
Term
(Negative Feedback Mechanisms)
Control Center
Definition
Establishes set point around which the variable is maintained
Term
(Negative Feedback Mechanisms)
Receptor
Definition
Monitors value of variable (i.e. blood pressure)
Term
Homeostasis
Definition
Existence & maintenance of a relatively constant environment w/in the body
Term
Variables
Definition
Values that can change
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