| A | B |
|---|
| circulatory system | the group of organs and tissues that act as transfer stations carrying needed materials to cells and removing their waste products. |
| arteries | blood vessels that carry blood away from the heart to various parts of the body. |
| veins | blood vessels that carry blood from all parts of the body back to the heart. |
| capillaries | tiny blood vessels that carry blood to and from almost all body cells and connect arteries and veins. |
| pulmonary circulation | when blood travels from the heart, through the lungs, and back to the heart. |
| systemic circulation | takes place when oxygen rich blood travels to all body tissues except the lungs. |
| blood pressure | the force of blood pushing against the walls of the blood vessels. |
| systolic pressure | the pressure when the heart contracts and pumps blood into the arteries |
| diastolic pressure | the pressure when the heart relaxes to refill with blood |
| pulse | the contractions of the heart as it pumps blood throughout the body |
| plasma | liquid part of your blood that contains red blood cells, white blood cells, and platelets |
| white blood cells | fight infection in the body and makes antibodies |
| red blood cells | contains hemoglobin and carries oxygen from the lungs to all parts of the body |
| platelets | helps blood clot |
| respiratory system | the organs that supply your blood with oxygen |
| trachea | a passageway in your throat that takes air into and out of your lungs |
| epiglottis | a flap of tissue in the back of your mouth that keeps food out of your trachea |
| bronchi | two passageways that branch from the trachea, one to each lung |
| lungs | two large organs that exchange oxygen and carbon dioxide |
| diaphragm | a large, dome shaped muscle below the lungs that expands and compresses the lungs and enables breathing |
