| A | B |
|---|
| circulatory system | the transport system of the human body |
| heart | the pump that pushes the blood throughout the entire system |
| blood | a tissue made up of a liquid called plasma and several types of cells |
| arteries | carry blood away from the hear |
| capillaries | connect arteries to veins |
| veins | carry blood to the heart |
| pulse | throbbing caused by blood rushing into the arteries when the lower chambers of the heart contract |
| platelets | tiny discs in plasma that help the blood clot or thicken |
| plasma | a pale yellow liquid that contains water, nutrients, wastes and salts |
| recipient | a person who receives blood |
| donor | a person who gives blood |
| excretory system | a system for ridding itself of harmful wastes produced by cells |
| kidneys | two organs that clean and filter the blood |
| urine | they yellowish liquid containing wastes and water from the filtering units of the kidneys |
| sweat glands | small coiled tubes that end at pores on the skin's surface |
