| A | B |
|---|
| transport | process by which substances move into or out of cells or are distributed within cells |
| circulatory system | to transport materials to and from all parts of the organism |
| hemoglobin | (red) contains the red, iron-containing pigment |
| heart | The organ that pumps blood through the circulatory system |
| closed circulatory system | blood is always contained within tubes or vessels in the body |
| open circulatory system | the blood is not always encled in blood vessels it flows directly into body spaces bathes the tissues |
| veins | return blood from the body tissues to the heart |
| arteries | carry blood away from the heart to the organs and tissues of the body |
| valve | inside veins and allow the blood to flow in only one direction toward the heart |
| pericardium | covers the heart and protects it |
| atria | two upper, thin-walled chambers |
| ventricles | two lover, thick-walled chambers |
| aorta | blood flows out of the left ventricle into it (largest artery of the body) |
| pulmonary artery | divides into two branches each of which goes to one of the lungs |
| pulmonary circulation | the first pathway caries blood between the dheart and the lungs |
| pulse | is the expansion (high pressure) and relaxation (lower pressure) that can be felt in an artery each time the left ventricle contracts an relaxes |
| superior vena cava | one of the largest veins in the body empty into right atrium of the heart |
| systemic circulation | the second pathway-carries blood between the heart and the rest of the body |
| coronary circulation | supplies blood to the muscles of the heart. |
| inferior vena cava | one of the largest veins in the body. Empties into right atrium of the heart. |
| hepatic portal circulation | carries blood from the digestive tract to the liver |
| renal circulation | carries blood to and from the kidneys. |
| intercellular fluid | colorless watery fluid -helps move materials between the capillaries and the body cells |
| lymph nodes | these glands play an important role in the body's defense against disease. |
