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Chapter 14 Term
Science Terms
| Term | Definition |
|---|---|
| Cell | Is the basic unit of structure and function in a living thing. |
| Cell Membrane | Form the outside boundary of the cell. |
| Nucleus | Is the control center that directs the cell's activities and contains the cell's form and function |
| Cytoplasm | The material within a cell apart from the nucleus |
| Tissue | Is a group of similar cells that perform the same function |
| Muscle Tissue | Can contract or shorten |
| Nervous Tissue | Directs and controls the process |
| Connective Tissue | Provides support for your body and connects all its parts |
| Epithelial Tissue | Surfaces of your body, inside and out, are covered |
| Organ | Is a structure that is composed of different kinds of tissue |
| Organ System | A group of organs that work together to perform a major function |
| Homeostasis | The body's tendency keep an internal balance |
| Stress | Is the reaction of your body to potentially threatening, challenging , or disturbing events |
| Skeleton | Is made up of all the bones in your body |
| Vertebrae | That make up your backbone |
| Joint | Is a place in the body where two bones rather than fewer large ones |
| Ligaments | Movable joints are held together by strong connective tissue |
| Cartilage | Joints have a second type of connective tissue |
| Compact Bone | The outer membrane is a layer which is hard and dense, but not solid |
| Spongy Bone | Has many small spaces within it |
| Marrow | The spaces in bones contain a soft, connective tissue |
| Osteoporosis | A condition in which the bones body's become weak and break easily |
| Involuntary Muscle | The muscles that are not under your conscious control |
| Voluntary Muscle | The muscles that are under your conscious control |
| Skeletal Muscle | Are attached to the bone of your skeleton and provide the force that moves your bones |
| Tendon | Is a strong connective tissue that attaches muscle to bone |
| Striated Muscle | A muscle that appears banded |
| Cardiac Muscle | Is found only in your heart |
| Epidermis | Is the outer layer of the skin |
| Melanin | A pigment, or colored substance, that gives skin its color |
| Dermis | Is the inner layer of the skin |
| Pores | An opening through which sweat reaches the surface of your skin |
| Follicles | Structure in the dermis of the skin from which a strand of hair grows |
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