The lungs are not working well enough to oxygenate the blood to a healthy level
Venous blood is oxygen poor (in comparison with arterial blood).
Oxygen-poor blood is dark red; oxygen-rich blood is bright red.
Oxygen poor blood
poor
no you have oxygen high blood.
The pulmonary artery carries oxygen poor blood and the pulmonary vein carries oxygen rich blood.
If the oxygen-rich blood and the oxygen poor blood mix the amount of oxygen becomes diluted. The cells and tissues need more oxygen than they will get.
The right chambers have oxygen poor blood. The right atrium receives oxygen-poor blood from the body circulation, and the right ventricle pumps it to the lungs.
blood in the most veins are oxygen poor blood because it gives greenish colour.
If the oxygen-rich blood and the oxygen poor blood mix the amount of oxygen becomes diluted. The cells and tissues need more oxygen than they will get.
If the oxygen-rich blood and the oxygen poor blood mix the amount of oxygen becomes diluted. The cells and tissues need more oxygen than they will get.
Blood entering the left ventricle is rich in oxygen. In contrast, oxygen-poor blood enters the right ventricle.