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Science
Biology
Organ Systems
All Subcategories (34)
Cardiovascular System
Circulatory and Respiratory
Circulatory and Respiratory Systems
Circulatory System
Circulatory, Respiratory
Digestive and Excretory Systems
Digestive System
Excretory System
Eye
Function
Functions and Hierarchy
Functions of Organ Systems
Functions of the Organ System
Heart, Arteries, and Veins
Homeostasis
Identification and Location
Integrated Organs
Integumentary System
Invertebrates
Kidneys
Liver
Muscular and Respiratory
Nervous and Respiratory
Nervous System
Not applicable
Physiology
Reaction to Stimuli
Reproductive System
Respiratory and Digestive Systems
Respiratory System
Sensory Organs
Specific Organ Systems
Urinary System
Visualization and Representation of Organs
Parent Categories (22)
Anatomy
Anatomy and Physiology
Anatomy of Organisms
Anatomy or Human Body Systems
Anatomy/Physiology
Animal Anatomy
Biological Systems
Biology
Body Systems
Cells
Cellular Biology
Cellular respiration
Comparative anatomy
Human Anatomy
Human Anatomy and Physiology
Human Body
Human Body Systems
Invertebrates
Organism
Plant Anatomy
Science or Biology
Toxicology