Blood returning from systemic circulation enters the heart at the right atrium. Blood from the pulmonary circulation enters the left atrium.
Oxygen reaches all parts of an animal's body when it enters the lungs and is carried by the circulatory system, specifically hemoglobin in red blood cells. The oxygen is then delivered to tissues and cells through blood vessels, where it is used in the process of cellular respiration to produce energy.
Heart has two sides (4chambers) separated by a septum.One side it collects the impure blood ie from all the parts of our body and pumps it to lungs. At lungs through alveoli the co2 diffuses out and oxygen enters the blood. this pure blood (oxygenated blood) enters the other side of heart from where it is pumped to all body parts AND cycle continues.
Blood enters the heart through the Inferior Vena Cava from all the regions of the body below the heart
Your heart pumps blood to all parts of the body.
Blood supplies oxygen and nutrients to all parts of the body.
detoxidation
pumps blood to all body parts
all parts
to carry blood all parts of the body
The blood in our heart is carried to all parts of our body. The heart pumps the blood, and the blood is carried by veins. The veins are all over our body. They have a system; out to our body, and back to the heart.
The lungs. Oxygen enters our lungs as part of the air that we breathe. It goes to the blood vessels deep in our lungs and then on to all parts of our body.