| A | B |
|---|
| Component of blood that is essential to help defend the body against disease. | leukocytes |
| white blood cells | leukocytes |
| red blood cells | erythrocytes |
| Blood below the heart returns to the heart via the _____. | inferior vena cava |
| all blood above the heart returns to the heart via the _______. | superior vena cava |
| tough saclike membrane covering the heart | pericardium |
| Tissue that divides the heart lengthwise | septum |
| upper chamber of the heart | atrium |
| lower chamber of the heart | ventricle |
| movement of blood through the digestive tract and liver is called | hepatic portal circulation |
| Component of blood that is essential for transporting oxygen to the body cells. | erythrocytes |
| Component of blood that is essential to the formation of a blood clot | platlets |
| The movement of blood from the heart to the lungs and back to the heart | pulmonary circulation |
| blood vessels that contain valves which prevent the blood from moving backward or downward | veins |
| sticky, straw-colored fluid found in blood that is 90% water | plasma |
| Which organ removes old red blood cells, platelets, bacteria, and other particles from the blood | spleen |
| tiny thin, walled blood vessels across which gases are exchanged? | capillaries |
| Blood vessels that return blood to the heart? | veins |
| Type of muscle tissue found in the heart | cardiac |
| Blood vessels that carry blood away from the heart? | arteries |
| Another name for coronary thrombosis | a heart attack |
| causes blood to be red | hemoglobin |
