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Lvls of Organization
| Term | Definition |
|---|---|
| cell differentiation | the process by which cells become different types of cells |
| tissue | a group of similar types of cells that work together to carry out specific tasks |
| organ | a group of different tissues working together to perform a particular job |
| organ system | a group of organs that work together and perform a specific task |
| muscle | strong body tissue that can contract in an orderly way |
| joint | where two or more bones meet |
| ligament | the tissue that connects bones to other bones |
| hydrostatic skeleton | a fluid-filled internal cavity surrounded by muscle tissue |
| exoskeleton | a thick, hard outer covering; protects and supports an animal’s body |
| cardiac muscle | muscle found only in the heart |
| smooth muscle | involuntary muscle named for its smooth appearance |