| A | B |
|---|
| Artery | blood vessel that carries blood away from the heart, and has thick, elastic walls made of connective tissue and smooth muscle tissue |
| Atrium | two upper chambers of the heart that contract at the same time during a heartbeat |
| Capillary | microscopic blood vessel that connect arteries and veins; has wall one cell thick, through which nutrients and oxygen diffuse into body cells, and waste materials and carbon dioxide diffuse out of body cells |
| Coronary circulation | flow of blood to and away from the tissues of the heart |
| Hemoglobin | chemical in red blood cells that carries oxygen from the lungs to body cells, and carries some carbon dioxide from body cells back to the lungs |
| Lymph | tissue fluid that has diffused into lymphatic capillaries |
| Lymph node | bean-shaped organs found throughout the body that can filter out microorganisms and foreign materials taken up by the lymphocytes |
| Lymphatic system | carries lymph through a network of lymph capillaries and vessels, and drains it into large veins near the heart; helps fight infection and diseases |
| Lymphocyte | a type of white blood cell that fights infection |
| Plasma | liquid part of the blood, made mostly of water, in which oxygen, nutrients, and minerals are dissolved |
| Platelet | irregularly shaped cell fragment that helps clot blood and releases chemicals, that help form fibrin |
| Pulmonary circulation | flow of blood through the heart to the lungs and back to the heart |
| Systemic circulation | largest part of the circulatory system, in which oxygen rich blood flows to all the organs and body tissues, except heart and lungs, and oxygen poor blood is returned to the heart |
| Ventricle | two lower chambers of the heart, that contract at the same time, during a heartbeat |
