- Has a capsule/outer layer
- Has an endothelium
- Has a thick tunica media (smooth muscle and many elastic fibres, which allow the arteries to deal with high pressure blood)
- Has a proportionally thicker tunica externa
- Small lumen
- High pulsitile blood pressure
- Function= carry blood away from the heart
(C) Capillary:
- Has an endothelium (squamous epithelium)
- 1 RBC thick lumen
- Average blood pressure
- Function= exchange surface to the organs
(B) Vein:
- Has a capsule/outer layer
- Has an endothelium
- Thin tunica media (smooth muscle and elastic fibres)
- Thin tunica externa
- Contains valves (stops the back flow of blood reducing the chance of varicose veins)
- Large lumen
- Very low blood pressure
- Function= Carry blood to the heart
No comments:
Post a Comment