The capillaries absorb oxygen at the lungs. This occurs near the alveoli.
the blood absorb oxygen in the lungs(cappilaries)
Carbon dioxide is produced as a waste product of respiration, and is taken in the bloodstream to the capillaries outside the lungs, where the CO2 diffuses into the alveoli of the lungs.
greater concentration of oxygen in the air sacs of the lungs than in the capillaries.
Capillaries in Villi absorb all other nutrients except fat.
The lungs contain air sacs called alveoli which are surrounded by blood capillaries to allow gaseous exchange.
The substance found in red blood cells that helps them absorb oxygen easily is hemoglobin. Hemoglobin is a protein molecule that carries oxygen from the lungs to the body's tissues and returns carbon dioxide from the tissues back to the lungs.
Hemoglobin is a protein in red blood cells that can absorb oxygen. It binds to oxygen in the lungs, carries it through the bloodstream, and releases it to cells throughout the body.
They absorb so much oxygen because of the Alveoli. An Alveoli are the endings of small tubes that are located in your lungs and transfer oxygen to your capillaries.
oxygen
The respiratory system seems like the obvious answer, but you used the word absorb. The respiratory system takes air into the lungs, but the red blood cells (erythrocytes) absorb the oxygen out of the air taken into the lungs. The circulatory system then delivers these red blood cells to the capillaries where the oxygen is traded for carbon dioxide as the cells need.
It diffuses because the concentration of oxygen in the capillaries is lower than the concentration of oxygen in the air (law of diffusion).
The process used to move oxygen into the capillaries of the lungs is called diffusion. Oxygen in the alveoli of the lungs moves across the thin walls of the alveoli and the capillaries by diffusion, from an area of high concentration to an area of low concentration, facilitated by the pressure difference between the alveoli and the blood in the capillaries.