| A | B |
|---|
| Veins | Blood vessel that carry blood to the heart |
| Capillary | Microscopic thin walled blood vessels |
| Blood vessels | Capillary, vein, artery |
| Artery | Blood vessel that carry blood away from the heart |
| Valve | Structure in veins that cause blood to move one-way |
| Ventricle | Pumps blood to the lungs or body |
| Atrium | Receives blood from the body or lungs |
| closed circulatory system | System that contains a heart and blood vessels that are directly connected to one another. |
| open circulatory system | System where blood washes through open spaces. |
| pulse | Rhythmic expansion and contraction of an artery. |
| Pascal’s principal | Any change in pressure applied to a fluid in a confined space is sent unchanged throughout the fluid. |
| Blood pressure | The pressure blood exerts against the inner walls of blood vessels. |
| Atherosclerosis | A condition in which fatty deposits and calcium build up inside the coronary arteries. |
| Hypertension | High blood pressure |
| Plasma | Carries hormones, nutrients, minerals, and oxygen through the blood. |
| Red blood cells | Carries oxygen FROM lungs TO cells |
| Hemoglobin | Iron containing pigment |
| White blood cells | Fights invaders |
| Platelets | Irregularly shaped cell fragments |
| Antigens | Foreign chemicals and proteins |
| Antibodies | Produced on the surface B-cells |
| vaccine | Introduces dead or weakened antigens |
| Clotting | Process by which a broken blood vessel seals off |
| Skin | First line of defense |
