Question

3- Mammals have four chambered heart. State the advantages over reptiles.
LO- State three common features of respiratory organs in animals
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Answer 1

Explanation:

Respiration is the process of releasing energy from food and this takes place inside the cells of the body. The process of respiration involves taking in oxygen (of air) into cells, using it for releasing energy by burning food, and then eliminating the waste products (carbon dioxide and water) from the body. Respiration is an essential for life because it provides energy for carrying out all the life processes which are necessary to keep the organisms alive.

Answer 2

advantages of four chambered heart over Mammals

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 surface 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.