*3 Main types of blood vessels
1. Arteries / Artery
2. Veins / Vein
3. Capillaries / Capillary
3 Layers of Blood Vessels
- Inner layer : Endothelium
- Middle layer : Involuntary muscle with fibrous tissue
- Outer layer : Fibrous tissue
*Arteries
- All arteries carries oxygenated blood from heart to body
- Except Pulmonary Artery > Carry deoxygenated blood from heart to lungs
Aorta > Arteries > Arterioles > Capillaries > Venules > Vein > SVC/IVC
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*Veins
- All veins carry deoxygenated blood back to the Heart
- Except Pulmonary Vein > Carries oxygenated blood from lungs to heart
- Larger veins have valves > Prevent backflow of blood and ensure blood flows to the heart
Capillaries
- Consist of :
> Single layer of endothelium with a verythin basement membrane
> Tiny vessels that link the smallest arterioles to the smallest venules
*Difference between Arteries and Veins
Arteries | Veins
A: Carry blood away from the heart | V: Carry blood towards the heart
A: Oxygenated blood (except Pulmonary Artery) | V: : Deoxygenated blood (except Pulmonary Vein)
A: Thick muscular walls | V: Thin muscular walls
A: Have elastic tissue in walls | V: Little / no elastic tissue in walls
A: Do not process valves | V: Larger veins posses valves
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Biology Science 1
RandomThis is just my Biology notes for my studies in school. It might benefit you. If you have any questions or doubts, do comment down! Thank you!
