Describe double circulation of blood in human beings. Why is it necessary?
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✠ Ɗoυbℓє Círcυℓatíoη Of Ɓℓood Íη Ӈυmaη Ɓeíηgs ✠
៚ ᴍᴀᴍᴍᴀʟs ʜᴀᴠᴇ ᴀ ᴅᴏᴜʙʟᴇ ᴄɪʀᴄᴜʟᴀᴛᴏʀʏ sʏsᴛᴇᴍ. ᴛʜɪs ᴍᴇᴀɴs ᴛʜᴀᴛ ᴅᴜʀɪɴɢ ᴀ sɪɴɢʟᴇ ᴄʏᴄʟᴇ, ᴛʜᴇ ʙʟᴏᴏᴅ ɢᴏᴇs ᴛᴡɪᴄᴇ ɪɴ ᴛʜᴇ ʜᴇᴀʀᴛ. ᴛʜᴇʀᴇ ᴀʀᴇ ᴛᴡᴏ ʟᴏᴏᴘs ɪɴ ᴡʜɪᴄʜ ʙʟᴏᴏᴅ ɪs ᴄɪʀᴄᴜʟᴀᴛᴇᴅ. ᴏɴᴇ ʟᴏᴏᴘ ɪs ᴏxʏɢᴇɴᴀᴛᴇᴅ ᴀɴᴅ ᴛʜᴇ ᴏᴛʜᴇʀ ɪs ᴅᴇ-ᴏxʏɢᴇɴᴀᴛᴇᴅ. ᴛʜɪs ᴅᴏᴜʙʟᴇ ᴄɪʀᴄᴜʟᴀᴛᴏʀʏ sʏsᴛᴇᴍ ɪs ɪᴍᴘᴏʀᴛᴀɴᴛ ʙᴇᴄᴀᴜsᴇ ɪᴛ ᴇɴsᴜʀᴇs ᴘʀᴏᴠɪsɪᴏɴ ᴏғ ᴏxʏɢᴇɴᴀᴛᴇᴅ ʙʟᴏᴏᴅ ᴛᴏ ᴛʜᴇ ᴍᴜsᴄʟᴇ ᴀɴᴅ ɴᴏᴛ ᴀ ᴍɪxᴛᴜʀᴇ ᴏғ ᴏxʏɢᴇɴᴀᴛᴇᴅ ᴀɴᴅ ᴅᴇ-ᴏxʏɢᴇɴᴀᴛᴇᴅ ʙʟᴏᴏᴅ. ʜᴇɴᴄᴇ, ᴛʜɪs sʏsᴛᴇᴍ ᴇɴsᴜʀᴇs ᴇғғɪᴄɪᴇɴᴛ sᴜᴘᴘʟʏ ᴏғ ᴏxʏɢᴇɴᴀᴛᴇᴅ ʙʟᴏᴏᴅ ᴛᴏ ᴛʜᴇ ᴍᴜsᴄʟᴇs.
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Answer:
Double circulation means, in a single cycle blood goes twice in the heart. The process helps in separating oxygenated and deoxygenated blood to maintain a constant body temperature.
The double circulatory system of blood includes
- Pulmonary circulation
- Systemic circulation.
Pulmonary circulation:
The right ventricle pumps deoxygenated blood into the lungs where it is oxygenated. The oxygenated blood is brought back to the left atrium, from there it is pumped into the left ventricle and finally blood goes into the aorta for systemic circulation.
Systemic circulation:
The oxygenated blood is pumped to various parts of the body from the left ventricle. The deoxygenated blood from different parts of the body passes through vena cava to reach right atrium. The right atrium transfers the blood into right ventricle.