answersLogoWhite

0

How does oxygen enter the human body?

Updated: 8/10/2023
User Avatar

Wiki User

9y ago

Best Answer

oxygen (O2) enters the body via respiration (breathing) it enters small pouches in the lungs called alveoli. these alveoli are surrounded by tiny blood vessels called capillaries. there is an exchange at these alveoli, carbon dioxide (CO2) exits the blood and O2 enters the blood. this freshly oxygenated blood is now returned via the pulmonary vein to the Left side of the heart. the left ventricle pumps blood to the body. as the blood vessels get smaller they again form capillaries. there is another exchange of gasses, O2 is transferred out to the cells and CO2 (the waste product from cellular metabolism) is transferred to the blood. the Deoxygenated blood is then returned via the venous system to the right side of the heart. the deoxygenated blood is pumped back to the lungs and the alveoli via the pulmonary artery. and then the whole cycle starts over again.

hope this helps :)

User Avatar

Wiki User

14y ago
This answer is:
User Avatar
More answers
User Avatar

Wiki User

9y ago

Oxygen enters the body through the nose and mouth as humans breathe in. The respiratory system supplies oxygen to the blood in order for the blood to deliver oxygen to the parts of the body.

This answer is:
User Avatar

User Avatar

Wiki User

9y ago

By osmosis and diffusion through the lungs.

This answer is:
User Avatar

User Avatar

Wiki User

9y ago

The respiratory system.

This answer is:
User Avatar

User Avatar

Wiki User

14y ago

by inhaling it or breathing

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: How does oxygen enter the human body?
Write your answer...
Submit
Still have questions?
magnify glass
imp