BRAINCAKECapillaries
Capillaries exchange metabolic materials such as oxygen, carbon dioxide and glucose between the blood and cells of the body.
Their walls consist mostly of the endothelium layer lining the blood vessels making them extremely thin for rapid diffusion.
There are numerous and they are highly branched, providing a large surface area for exchange.
Sign in free to see the rest of this lesson, the R.E.C.I.P.E. recall steps and the quiz
BrainCake is free. Make an account in seconds and pick up where this page stops.
Key terms in this lesson
- diffusion
- The net passive movement of molecules or ions from a region of higher concentration to a region of lower concentration, down a concentration gradient.
More in Mass Transport in Animals
- Pressure and Volume Changes
- Cardiac Output
- Blood Vessels
- Arteries
- Arterioles
- Veins and Venules
- Tissue Fluid
- Return of Tissue Fluid to Blood
All 27 lessons in Mass Transport in Animals · All AQA AS-level Biology topics