to allow gas exchange (oxygen and carbon dioxide)
only metabolic wastes out of the capillary
The arterial and capillary walls are incredibly strong. This is true otherwise you would be bleeding just by tapping yourself.
they have skinny walls
500
The chambers of the heart, from those with the thickest walls to those with the thinnest walls, are the left ventricle, right ventricle, left atrium, and right atrium. The left ventricle has the thickest walls to pump blood throughout the body, while the right ventricle has moderately thick walls for pulmonary circulation. The left atrium has thinner walls as it receives blood from the lungs, and the right atrium has the thinnest walls since it receives blood from the body.
Capillary walls receive oxygen in the lungs by a process known as diffusion.
neutrophils
diapedesis
Osmosis
Capillaries in the circulatory system have the thinnest walls in the body, allowing for the exchange of nutrients and waste products between blood and tissues.
bronchials
The capillary walls are the thinnest blood vessels to allow the exchange of materials.Capillary walls only have a single layer of endothelial cells (the flattened layer of cells that line the closed spaces in the body). This is unlike the arteries and veins which have multiple layers such as smooth muscle, elastin, and connective tissues. The thin walls allow for oxygen and waste products (such as carbon dioxide) to diffuse between the tissues and blood.