| Term | Definition |
| Arteries | carry oxygentated blood away from heart, except pulmonary artery carries deoxygenated blood away from heart |
| Arterioles | Smaller vessels that branch off arteries that carry oxygenated blood away from heart |
| Capillaries | 1x cell thick, gas and nutrient exchange occurs away from heart |
| Venule | Small vessels that bring blood toward the heart; contains valves, lead to veins |
| Veins | Large vessels carry blood toward the heart, contains valves except pulmonary vein, carries oxygenated blood toward the heart |
| Tunica Interna | Innermost layer; smooth, seamless |
| Tunica Media | Muscle layer; smooth, contracts called peristalsis (wavelike contraction) thickest layer |
| Tunica Exteina | Outermost layer, connective tissue |
| Great Saphenous | Longest vein in body |
| Hepatic | Liver |
| Carotid | Brain |
| Renal | Kidney |
| Spenlic | Spleen |
| Brachio | Arm |