☆☞write a short note on capillaries.
Answers
Answer:
Capillaries are very narrow thin blood vessels. Arteries branch out many times to form capillaries, these capillaries then join up to form veins. ... Waste products such as carbon dioxide diffuse from the body's cells, into the tissue fluid and are reabsorbed back into blood in the capillaries.
Answer: mark as brainliest and follow me plz
Explanation: A capillary is a small blood vessel from 5 to 10 micrometres (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.
During early embryonic development new capillaries are formed through vasculogenesis, the process of blood vessel formation that occurs through a de novo production of endothelial cells which then form vascular tubes. The term angiogenesis denotes the formation of new capillaries from pre-existing blood vessels and already present endothelium which divides.