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Ch. 14 Vocabulary
| Term | Definition |
|---|---|
| cell | the basic unit of structure a d function in a living thing. |
| cell membrane | the outside boundary of a cell. |
| nucleus | the control center that directs the cell's activities and contains the information than determines the cell's form and function. |
| cytoplasm | the material within a cell apart from the nucleus. |
| tissue | a group of similar cells that perform the same function. |
| muscle tissue | enables movement of the body and internal organs. |
| nervous tissue | directs and controls the process. |
| connective tissue | provides support got your body and connects all its parts |
| epithelial tissue | protects the delicate structures that lie beneath it .. |
| organ | 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 process by which an organism's internal environment is kept stable in spite of changes in the external environment. |
| stress | the reaction of your body to potentially threatening, challenging, or disturbing events. |
| (12.2) skeleton | all the bone in your body. |
| vertebrae | your backbone. |
| joint | a place in your body where two bones come together. |
| ligament | the connective tissue that holds the bones on moveable joints. |
| cartilage | more flexible than bone |
| compact bone | a bone that is hard and dense but not solid |
| spongy bone | a part of a bone that has many small spaces within it. |
| marrow | the connective tissue in between the spaces in bones. |
| osteoporosis | a condition in which the body's bones become weak and break easily |
| (12.3) involuntary muscle | muscles that are not under your conscious control |
| voluntary muscle | muscles that are under your conscious control |
| skeletal muscle | muscles attached to the bones of your skeleton and provide the force that moves your bones. |
| tendon | a strong connective tissue that attaches muscle to bone |
| striated muscle | muscles that appear banded |
| smooth muscle | the inside of many internal organs |
| cardiac muscle | muscle that is found only in your heart |
| (12.4) epidermis | the outer layer of the skin |
| melanin | a pigment, or colored substance, that gives skin its color. |
| dermis | the inner later of the slin |
| pore | openings in which perspiration reaches the surface |
| follicle | structures in which hairs grow within the dermis |
| cancer | a disease in which some cells in the body divide uncontrolably |
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