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Veins

2017-10-28T13:40:06Z

160052446:

 Veins are blood vessels which carry deoxygenated blood from body tissues back to the heart and lungs. In the lungs the deoxygenated blood is reoxygenated through [[Gaseous exchange|gaseous exchange]] in the [[Alveoli|alveoli]].

'''The structure of Veins'''

Veins are made of thin walls of smooth muscle, and endothelial tissue<ref>https://www.mananatomy.com/basic-anatomy/veins 28/10/2017</ref>. They also contain valves, which assist in moving blood at low pressure against the force of gravity back to the heart, in order to be recirculated through the lungs.

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<references /> https://www.mananatomy.com/basic-anatomy/veins, 28/10/2017

Veins

2017-10-28T13:39:24Z

160052446:

 Veins are blood vessels which carry deoxygenated blood from body tissues back to the heart and lungs. In the lungs the deoxygenated blood is reoxygenated through [[Gaseous exchange|gaseous exchange]] in the [[Alveoli|alveoli]].

'''The structure of veins''' Veins are made of thin walls of smooth muscle, and endothelial tissue<ref>https://www.mananatomy.com/basic-anatomy/veins 28/10/2017</ref>. They also contain valves, which assist in moving blood at low pressure against the force of gravity back to the heart, in order to be recirculated through the lungs.

<references /> https://www.mananatomy.com/basic-anatomy/veins, 28/10/2017

Veins

2017-10-28T13:37:33Z

160052446: Created page with " Veins are blood vessels which carry deoxygenated blood from body tissues back to the heart and lungs. In the lungs the deoxygenated blood is reoxygenated through [[Gaseous_..."

 Veins are blood vessels which carry deoxygenated blood from body tissues back to the heart and lungs. In the lungs the deoxygenated blood is reoxygenated through [[Gaseous_exchange|gaseous exchange]] in the [[Alveoli|alveoli]].

'''The structure of veins'''
Veins are made of thin walls of smooth muscle, and endothelial tissue<ref name="1">https://www.mananatomy.com/basic-anatomy/veins 28/10/2017</ref>. They also contain valves, which assist in moving blood at low pressure against the force of gravity back to the heart, in order to be recirculated through the lungs.