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Brandy Boyd

SCI220 weeks 1-5

TermDefinition
Levels of Structural Organization The body’s organization from simplest to most complex — chemical → cellular → tissue → organ → organ system → organism.
Homeostasis The body’s ability to maintain a stable internal environment despite external changes (example: regulating body temperature).
Anatomical Position The standard position for anatomical reference — standing upright, facing forward, arms at sides, palms facing forward.
Elements of Life The four main elements in the human body are oxygen, carbon, hydrogen, and nitrogen.
pH Scale A scale from 0–14 measuring acidity or alkalinity; 7 is neutral, lower is acidic, higher is basic.
Cell Membrane A selectively permeable barrier that regulates what enters and exits the cell, maintaining internal balance.
Mitochondria The “powerhouse” of the cell — produces ATP (energy) through cellular respiration.
Tissue A group of similar cells performing a common function; the four main types are epithelial, connective, muscle, and nervous tissue.
Integumentary System Includes skin, hair, and nails; functions in protection, temperature regulation, and sensory reception.
Skeletal System Functions Provides support, movement, protection, blood cell production, and mineral storage.
Created by: user-1992641
 

 



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