| A | B |
|---|
| red blood cells | shaped like discs with a dimple on each side |
| red blood cells | carries oxygen to the rest of the body |
| sickle cell anemia | disease in which red blood cells have a shape like a crescent moon |
| platelets | incomplete cells that form blood clots |
| embolism | a clot that floats freely in blood vessels and then blocks a vessel |
| white blood cells | protect your body from germs and other harmful things |
| leukemia | disease in which white celss do not form correctly |
| arteries | blood vessels that carry blood away from your heart to other parts of your body |
| capillary | smallest kind of blood vessel |
| veins | blood vessels that take blood from cells back to the heart |
| valves | flaps that act like doors to keep blood flowing in one direction |
| left ventricle | pumps oxygen-rich blood away from the heart into the aorta |
| aorta | your body's largest artery |
| mucus | a sticky, thick fluid that traps dust, germs, and other things that may be in the air |
| trachea | a tube that carries air from the larynx to the lungs |
| bronchioles | small tubes branching from the bronchi in the lungs |
| air sacs | where oxygen enters the blood and carbon dioxide leaves the blood |
| alveoli | another name from air sacs |
| cilia | tiny, hairlike structures on cells in the linings of many parts of the respiratory system |
| larynx | vocal cords stretch across this |
| esophagus | a tube that carries food to the stomach |
| epiglottis | moves to cover your trachea when you swallow and prevents food from going down the wrong pipe |
| salivary glands | makes saliva |
| tongue | moves food to the back of the mouth |
| teeth | Adults have 32 of these |
| kidney | a pair of organs that remove wastes from your blood |
| trachea | tube between the larynx and the bronchi |
| bronchioles | the parts in the lungs where oxygen enters the blood stream |
| mucus | a coating of sticky fluid |
| valves | keep blood from flowing backward |
| artery | carries blood from the heart to the smallest blood vessels |
| veins | carry blood toward the heart |
| ringed muscles | push food to the stomach |
| air sacs | tubes that carry air inside the lungs |
| capillaries | structures that connect the smallest arteries with the smallest veins |
| stomach, pancreas, liver | organs that make digestive fluids |
