Question

Describe double circulation of blood in human beings. Why is it necessary?
Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.
ᴀʜʜʜ!! ᴅᴀᴍñ...
ᴄʜᴜᴘ ʜᴏ ᴊᴀᴏ ᴀʙ ᴘᴀɢᴀʟ..
ᴛʜᴏᴅɪ sʜᴀʀᴀᴍ ᴋʀ ʟᴏ..​

Answer 1

Answer:

This means that during a single cycle, the blood goes twice in the heart. ... This double circulatory system is important because it ensures provision of oxygenated blood to the muscle and not a mixture of oxygenated and de-oxygenated blood. Hence, this system ensures efficient supply of oxygenated blood to the muscle.

Answer 2

ᴀᴀʀᴄʜɪ ᴋᴇ ᴛᴜᴍᴍʏ ᴍᴀɪ ᴘᴀɪɴ ʜᴏ ʀᴀʜᴀ ʜᴀɪ ʙᴏʜᴏᴛ

ᴀᴜʀ ᴍᴀɪ ʙɪᴍᴀʀ ᴛʜᴀ ɪsɪʟʏᴇ ᴏғғʟɪɴᴇ ᴛʜᴀ

ᴀɴᴅ ᴍᴀɪ ᴛᴜᴍʜᴇ ʙɪʟᴋᴜʟ ʙʜᴜʟᴀ ɴᴀʜɪ ʜᴜ ʙᴀs ᴊᴀʙ ᴍᴀɪ ᴏɴʟɪɴᴇ ʜᴏᴛᴀ ʜᴜ ᴛᴀʙ ᴛᴜᴍ ᴏғғ ʜᴏᴛɪ ʜᴏ ᴀᴜʀ ᴛᴜᴍ ᴏɴʟɪɴᴇ ʜᴏᴛɪ ʜᴏ ᴛᴀʙ ᴍᴀɪ ᴏғғ... ɪsɪʟʏᴇ ᴛᴜᴍʜᴇ ᴀᴀɪsᴀ ʟᴀɢ ʀᴀʜᴀ ʜᴀɪ