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7th Body Systems
TEKS 7.14A and 7.14B
| Term | Definition |
|---|---|
| cell | the smallest unit that can live on its own and that makes up all living organisms; microscopic |
| tissue | a group of cells that possess a similar structure and perform a specific function |
| organ | a part of the body that is made up of cells and tissues that perform a specific function; heart, lungs, stomach |
| organ system | a group of organs that work together to perform one or more functions |
| circulatory system | supplies oxygen and nutrients to the whole body and removes waste through blood |
| digestive system | breaks down food and liquids into nutrients the body can use |
| endocrine system | a group of glands and organs that produce and release hormones into the bloodstream |
| immune system | cells, tissues, organs, and the substances they make that helps the body fight infections and other diseases |
| integumentary system | the body's outer layer; protects the body from injury, infection, and the sun, and helps regulate body temperature |
| respiratory system | takes up oxygen from the air we breathe and removes the unwanted carbon dioxide; gas exchange |
| reproductive system | produces gametes (sperm and eggs) and supports the development of offspring |
| urinary system | filters the blood, removing waste and excess water as urine |
| skeletal system | gives the body its shape, protects organs, and allows for movement |
| muscular system | allows the body to move, maintain posture, and circulate blood |
| nervous system | a network of nerves and nerve cells that sends signals between the brain and the body |
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