| A | B |
|---|
| Cells | the basic unit of living |
| Tissues | groups of cells that are alike and cooperate to do a job |
| Organ | structure made of living tissues that perform a specific function |
| body system | a group of organs that cooperate to do a job |
| body | the form of a person, or animal, or object |
| Circulatory system | group of organs that carries matter (blood) in the body from place to place |
| heart | organ that pumps blood around the body, muscles, and main organs |
| vessels | tiny tubes that blood travels through |
| blood | liquid that carries food and oxygen to cells and takes away wastes |
| Respitory System | a group of organs that help a person breathe |
| lungs | organ inside the chest with which we breathe; oxygen in; carbon dioxide out! |
| trachea | carries oxygen from the nasal passages to the bronchial tubes and windpipe |
| diaphragm | muscle in the respiratory system which contracts and relaxes to allow air in and push air out of the lungs |
| bronchi | 2 parts of the tracea that go to each of the lungs |
| digestive system | a group of organs that help breakdown and change food you eat into materials your blood vesseels can use |
| excretory system | a group of organs that collect waste and extra water from cellls and moves the waste out of the body |
| skeleton | a framework of connected bones |
| nervous system | controls all other systems; brain, spinal cord, nerves |
