| A | B |
|---|
| cell | The basic unit of structure and function of all living things |
| osmosis | The diffusion of water and dissolved materials through cell memebranes |
| cell membrane | The thin covering that encloses a cell and holds its parts together |
| system | Organs working together to perform a function |
| cytoplasm | A jellylike substance containing many chemicals thta keep a cell funcitioning. |
| tissue | Cells that work together to perform a specific function |
| diffusion | The process by which many materials move in and out of cells |
| capillaries | The smallest blood vessels |
| nucleus | 1).The orgnelle that controls all of a cell's activities. 2) The center of an atom. |
| alveoli | Tiny air sacs located at the ends of bronchi in the lungs. |
| organ | Tissues that work together to perform a specific function |
| nephrons | Tubes inside the kidneys where urea and water diffuse the blood |
| villi | The tiny tubes sticking into the small intestine |
| tendons | Tough bands of connective tissue that attach muscles to bones |
| bone marrow | A connective tissue that produces red and white blood cells |
| joint | A place where bones meet and are attaached to each other and to muscles |
| ligament | One of the bands of connective tissue that hold a skeleton together |
| neuron | A specialized cell that can receive information and transmit it to other cells |
| receptors | Nerve cells that detect conditions in the body's environment |
