Question

what are veins and their uses ​

Answer 1

Answer:

Explanation:

Veins are a part of the blood vessels . Veins carry the de-oxygenated blood from various parts of the body back to lungs for oxygenation . They have thin vessels as compared to the arteries . Veins also have valves to ensure blood flows only in one direction and there is no back flow of the blood .

Answer 2

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• ᴠᴇɪɴs ᴀʀᴇ ᴠᴇssᴇʟs ᴏғᴛʜᴇ ᴄɪʀᴄᴜʟᴀᴛᴏʀʏ sʏsᴛᴇᴍ ᴛʜᴀᴛ sᴜᴘᴘᴏʀᴛ ᴄɪʀᴄᴜʟᴀᴛɪᴏɴ ʙʏ ᴄᴏɴᴠᴇʏɪɴɢ ʙʟᴏᴏᴅ ᴛᴏ ᴛʜᴇʜᴇᴀʀᴛ.
• ʙʟᴏᴏᴅ ғʟᴏᴡɪɴɢ ᴛʜʀᴏᴜɢʜ ᴛʜᴇ ᴄɪʀᴄᴜʟᴀᴛᴏʀʏ sʏsᴛᴇᴍ ᴛʀᴀɴsᴘᴏʀᴛs ɴᴜᴛʀɪᴇɴᴛs, ᴏxʏɢᴇɴ, ᴀɴᴅ ᴡᴀᴛᴇʀ ᴛᴏ ᴄᴇʟʟs ᴛʜʀᴏᴜɢʜᴏᴜᴛ ᴛʜᴇ ʙᴏᴅʏ.