The human respiratory system is basically the circulation of the body. the lungs which produces air/oxygen that cycles around the body which produces oxygen.
Answer:
"Herd or "herds"
Explanation:
Animals living together in a group for generations are called "herds" or "herd"
Because these animals have been living together for generations and more to come.
Hope it helped brainiest plz
It’s the last one - it is breathed out
We need blood because it carries oxygen and helps us sustain life. The organ that pushes blood through the body is the heart.
