Capillaries Notes: Definitions & Explanations PDF | Download eBooks
Study Capillaries lecture notes PDF with biology definitions and explanation to study What are Capillaries?. Study capillaries explanation with biology terms to review biology course for online degree programs.
Capillaries Definition:
Capillaries are microscopic vessels with very thin and porous walls.
Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson
Capillaries Notes:
A capillary is a small blood vessel from 5 to 10 micrometers (µm) in diameter, and having a wall one endothelial cell thick. They are the smallest blood vessels in the body: they convey blood between the arterioles and venules. These microvessels are the site of exchange of many substances with the interstitial fluid surrounding them. Substances which exit include water (proximal portion), oxygen, and glucose; substances which enter include water (distal portion), carbon dioxide, uric acid, lactic acid, urea and creatinine. Lymph capillaries connect with larger lymph vessels to drain lymphatic fluid collected in the microcirculation.
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