Capillaries are very thin and therefore allow the substances to be diffused out of the thin layer of vein/artery. They are also very small and allow for a smaller amount of blood cells to be transported at one which helps to slow them down (also they are further away from heart) and deposit their substances to each cell.
Capillaries. they have such thin walls that substances can easily diffuse through them.
Oxygen and glucose are two substances that pass into the blood. Oxygen is essential for cellular respiration, while glucose provides energy for cells.
Oxygen must enter our blood and Carbon Dioxide must leave the blood through our lungs. They do so by diffusion between the cappillaries.
Blood in the capillaries are never in direct contact with air. Blood in contact with air is called bleeding. Oxygen, carbon dioxide (and other gases) diffuse across the alveolar and capillary walls to enter the blood stream (and leave).
Simple diffusion.
The capillaries are the site in the circulatory system where nutrients enter and wastes leave the tissues. The thin walls of the capillaries facilitate this diffusion.
Goes into the capillaries then to the vein
Oxegen and Carbon dioxide
Goes into the capillaries then to the vein
u havin' problem with biology requirement? ey.. ? sophomore..? altair or rigel? ;]
Gasses are exchanged mostly through the cells
Leaves