Human body systems
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31 terms
Terms | Definitions |
|---|---|
 How many muscles are in the body? | 600 muscles |
| Skeletal muscles | Help people move and are attached to the bones |
| Cardiac muscle | Heart muscle |
| Smooth muscle | Found in the body's organs and blood vessels |
| what muscles are we able to countrol? | voluntary muscles |
| what muscles work automaticlly and are found in our internal organs, blood vessels and our heart? | involuntary muscles |
| what muscle has to rest? | skeletal muscles |
| what muscle never rests? | cardiac muscles |
| what is the main function of the respiratory system? | provides our body with oxygen |
| what are some of the main organs in the respiratory system? | trachea, bronchi, lungs,alveoli and diaphragm |
| how many minutes can a person go with out air? | 3 minutes |
| what happens when the diaphragm moves down? | the lungs fill up with air |
| what happens when the diaphragm pushes up? | it pushes air out of the lungs |
| where does the exchange of oxygen and carbon dioxide take place? | in the alveoli |
| what is the main organ in the circulatory system? | the heart |
| what is the main function of the circulatory system? | it brings nutrients to all cells in the body |
| how many chambers are in the heart | 4 |
| what do red blood cells do? | provide oyxgen and nutrients to the cells |
| what fights infection? | white blood cells |
| what clots blood? | platelets |
| what is the main function of the digestive system? | it breaks down food so that nutrients and water can be used by the body as energy |
| what is the digestive system route? | mouth, esophagus stomach, small intestine, large intestine and the anus |
| how many days does it take for food to go through the entire system? | 2-3 days |
| why is it important to eat heathly food? | to keep your body heathly |
| how many bones are in an adult body? | 206 bones |
| how many bones in a new born baby? | 300 bones |
| why are the ribs thin and springy? | so they absorb knocks in the chest |
| what is the largest bone in your body? | the femur |
| what percentage of your bones are located in your hands and feet? | 50% |
| what keeps your bones strong? | calcium |
| what protects your brain? | skull |
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