ANATOMY

Detailed explanation-1: -A typical heart has two upper and two lower chambers. The upper chambers, the right and left atria, receive incoming blood. The lower chambers, the more muscular right and left ventricles, pump blood out of the heart.

Detailed explanation-2: -The heart has four chambers: two atria and two ventricles. The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle. The right ventricle pumps the oxygen-poor blood to the lungs. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle.

Detailed explanation-3: -Mammal and Bird Hearts As mammals, we have four main parts to the heart, a left and a right atrium and a left and a right ventricle. This is called a four-chambered heart.

Detailed explanation-4: -The four-chambered heart has a distinct advantage over simpler structures: 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.

Detailed explanation-5: -Heart: Function: Its significant role is to pump blood throughout the body. Enables transport of oxygen-rich blood to all components of the body. Helps regulate adequate blood pressure throughout the body. Transfers nutrients to cells, tissues, and all parts of the body. Final answer: