the lungs
Oxygen enters the blood in the alveoli of the lungs
Oxygen is entered through the mouth and carbon dioxide is released out of the mouth.
Blood entering the left ventricle is rich in oxygen. In contrast, oxygen-poor blood enters the right ventricle.
Oxygen enters the blood in the alveoli of the lungs
Oxygen enters the pulmonary blood in the capillaries of the alveoli -- the air sacs of the lungs.
Oxygen-poor blood enters the heart through the right atrium
It is part of the reproductive system. it is the opening to the birth canal
blood oxygen
Oxygen
blood
Oxygen
Oxygen enters the blood through the process of respiration in the lungs. In the lungs, oxygen diffuses from the alveoli into the blood capillaries surrounding them. It then binds to hemoglobin in red blood cells for transport to tissues throughout the body.