Question

if blood is filtered of impurities in the kidneys, why is the purified blood sent back to the main circulatory system along with the deoxygenated blood through the veins??​

Answer 1

Answer:

I think to pump because heart is a pumping Oragan. But lungs also pure the blood..

Explanation:

I if u ask the Google u can correct answer...

Answer 2

Answer:

ʜᴇʟʟᴏ ғʀɪᴇɴᴅ ғᴏʟʟᴏᴡ ᴍᴇ ᴍᴀʀᴋ ᴍᴇ ᴀs ʙʀᴀɪɴʟɪᴇsᴛ