| A | B |
|---|
| AIDS | Disease that destroys helper T cells. |
| Alveoli | Tiny air sacs in lungs where oxygen and carbon dioxide are exchanged with blood. |
| Aorta | main route in systemic circulation; carries blood to the body |
| Arteries | major blood vessels containing oxygenated blood; carry blood AWAY from heart |
| Atrium | Receiving chamber of the heart. |
| Blood | Circulating fluid. |
| Bronchii | two main branches of windpipe that carry air to lungs. |
| Capillaries | connect arteries and veins; deliver food and oxygen to body cells. |
| Circulatory | Transport |
| Coronary | Arteries which supply blood to heart itself |
| Erythrocytes | carry oxygen TO body cells - red blood cells. |
| Glottis | Opening to trachea; between vocal cords |
| Helper T | Cells of immune system which assist T and B |
| Hemoglobin | Protein in red blood cells that carries oxygen. |
| Immunity | Ability of body to defend itself against infection. |
| Larynx | Voice box; contains vocal cords. |
| Leukocytes | white blood cells; have a nucleus. |
| Lymph | Tissue fluid. |
| Lymphatic | Tissue fluid pick-up |
| Nodes | Structures which filter the lymph; centers for production of lymphocytes |
| Pacemaker | Area of specialized muscle which produces electric signals that cause heart to beat. |
| Pathogen | Disease-causing agent which causes an infection. |
| Plasma | Liquid part of blood. |
| Platelets | thrombocytes; function in blood clotting. |
| Pulmonary | Smaller circulatory system path; carries blood to lungs and back |
| Semilunar | Valve between ventricles and pulmonary artery or aorta. |
| Sinuses | Warm and clean air; make skull lighter. |
| Spleen | Largest organ of lymphatic system; destroys old erthyrocytes. |
| Systemic | Larger circulatory system path; carries blood to body and back |
| Thymus | Place where T lymphocytes mature. |
| Tonsils | Clusters of lymph tissue in throat. |
| Trachea | Wind pipe. |
| Valves | Prevent blood from leaking backwards. |
| Veins | Carry blood TO the heart; contain valves. |
| Ventricles | Pumping chambers of the heart. |
| Diffusion | basic mechanism for gas exchange in animals |
| Open | type of circulatory system; blood goes into hemocoels (spaces); invertebrates |
| Closed | type of circulatory system; blood in vessels throughout the body |
| Coagulation | formation of a blood clot; agglutination |
| Antigen | a protein; can be normal (ABO blood groups) or "foreign" which can cause a disease |
| Heart | pumping organ of circulatory system |
| Pericardium | sac enclosing the heart |
| Systole | contraction of heart; top number in blood pressure |
| Heart beat | sounds produced by heart valves closing |
| Bp | force blood exerts against the inner walls of blood vessels (abbreviation) |
| Hypertension | high blood pressure |
| One way | direction of flow in lymph vessels |
| Allergy | immune system attack against a non-harmful substance |
| Autoimmunity | immune system failure to recognize "self" from "non-self" |
