In the lungs, cells called alveoli form a thin membrane between the lungs and the capillaries. The alveoli extract oxygen from the air inhaled by the diaphragm, and transfers the oxygen to hemoglobin in red blood cells, which transport the oxygen to other parts of the body.
simple squamous epithelium
Diffusion
diffusion from red blood cells in capillaries to the tissue cells
Diffusion
simple squamous
Through diffusion from underlying connective tissue which have abundant blood vessels.
Normal lung tissue floats because of all the aveoli (tiny air pockets).
simple squamous. It allows for diffusion.
Diffusion occurs throughout the human body, and without it, cells and body tissue, dirty atmosphere, oxygen concentration may be low, and the eye can dry out.
by destroying outer retinal tissue, thus reducing the oxygen requirements of the retina, and increasing oxygen delivery to the remaining retina through alterations in oxygen diffusion from the choroid.
Oxygen and nutrients reach cells within tissues via the bloodstream. Blood is also responsible for transporting waste away from the cells.
Diffusion occurs across simple epithelial tissue. These are only one layer.
capillary