Question

9- Mammals have four chambered heart. State the advantages over reptiles.
10- State three common features of respiratory organs in animals​

Answer 1

Answer:

It allows us to send our "dirty" blood to the cleaners-the lungs-and our "clean" blood to the rest of the body without having to mix the two. That system is very efficient.

three common features of respiratory organ of animals

☆All the respiratory organs have large surfaces area to transport/exchange enough oxygen.

☆All the respiratory organs have thin walls for easy diffusion and exchange of respiratory gases.

☆All the respiratory organs such as skin, gills and lungs, have a rich blood supply for transporting respiratory gases.

《HOPE IT HELP》

^_^