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The human body (Definitions (cells (Most basic unit of structure and…
The human body
Definitions
cells
Most basic unit of structure and function in the body.
tissue
Group of connected cells that have a similar function
Organs
2 or more types of tissue doing the same job
organ systems
Group of organs that work together to carry out complex functions
Cells
Nerve cells: long projections to carry
messages
Muscle cells: have many mitochondria and contract
Tissue
Epithelial tissue-Lining of the inner and outer body surfaces
Muscle Tissue-Cells that can contract
organs
stomach
Digest food
lungs
brakes down oxegen
heart
Pumps blood over the body
organs systems
Maintain a stable internal environment
Excretory triggers water retention by kidneys if dehydrated
Endocrine triggers insulin if too much sugar in blood
Respiratory triggers faster breathing if oxygen needed