- Three types of blood vessels
- Artery: Carries blood from the heart to other parts of the body.
- Vein: Carries blood from other parts of the body back to the heart.
- The arteries divides into smaller branches called arterioles.
- The veins receives blood from smaller branches called venules.
- Capillaries: Blood vessels connect the arterioles and venules.
- Around the capillaries are body cells.
(Image derived from the work of Kelvinsong and is shared under the Creative Commons Attribution-Share Alike 3.0 Unported license.)
|Main function||Carries oxygenated blood from the to ather parts of the body||Carries dexoygenated blood from the other parts of the body to the heart.||Connect arterioles and venules.
Allows exchange of materials between the blood and the cells.
|Blood||Carries oxygenated blood except pulmonary artery||Carries deoxygenated blood except pulmonary vein|
|Valves||No valves except pulmonary artery||All have valves except pulmonary vein||No valves|
|Blood pressure||High||Low||Very low|
|Blood flow||Rapid||Slow||Very slow|
|Wall||Thick muscular wall||Thin wall and less muscular||Thin wall, only one-cell thick|
|Size of lumen||Small lumen||Big lumen||Very small lumen|
(All 3 images in the table above are derived from the work of Kelvinsong and is shared under the Creative Commons Attribution-Share Alike 3.0 Unported license.