B2023 Note : Blood vessel comparison

When I was cleaning up my belongings, one of the items I decided to get rid of was a piece of paper with a table comparing blood vessels printed on it. This table was created by our 2017 biology teacher 林宛君 师. I will place the table here for documentation purposes.

(I cannot guarantee that this post is going to be permanent)

	artery	vein	capillaries
blood carry direction	❤️➡️ away from the heart	➡️❤️ towards the heart	from the artery, to the vein
structure : connective tissue	✅ (thick)	✅ (thin)	❌
structure : spandex	✅ (more)	✅ (less)	❌
structure : flat muscle	✅ (thick)	✅ (thin)	❌
structure : flat cells	✅	✅	✅ (single layer, for exchanging materials)
vessel wall	📏📏📏 thickest	📏📏 mid	📏 thinnest
lumen	📏📏 mid	📏📏📏 widest	📏 most narrow (red blood cells have to line up)
vessel wall elasticity	most	mid	least
blood flow speed	🚀🚀🚀 fastest	🏃🏻‍♂️🏃🏻‍♂️ mid	🐌 slowest (for exchanging materials)
blood pressure	highest	lowest	mid
pulse	✅	❌	✅ (weak)
valve	❌	✅ (avoid blood flowing in reverse)	❌
diffusion	❌	❌	✅
blood movement caused by	ventricular contraction, vessel squeezing	lower limbs skeletal muscle movement, ventricle and atrium expansion	sphincter

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🔗 https://vitalrecord.tamu.edu/blood-vessel-formation-has-implications-for-cancer-and-other-diseases/