Structure of human heart :
1. The human heart is a muscular organ which pumps blood.
2. The heart is covered by the pericardial membrane.
3. It is of the size of a human fist and weighs about 360 gm.
4. As oxygen and carbon dioxide both have to be transported by the blood, the heart has different chambers, the left and the right, to prevent oxygen rich blood from mixing with the blood containing carbon dioxide.
5. The left half carries oxygenated blood whereas the right half carries deoxygenated blood. Such separation allows a highly efficient supply of oxygen to the body.
6. This is very essential in animals that have high energy needs, such as birds and mammals, which constantly use energy to maintain their body temperature.
7. Each half is further divided into two chambers. The upper one is called atrium and the lower one is termed as the ventricle. Therefore the human heart has four chambers.
8. There are valves between the atria and ventricles which ensure that the blood does not flow backwards.
1. The human heart is a muscular organ which pumps blood.
2. The heart is covered by the pericardial membrane.
3. It is of the size of a human fist and weighs about 360 gm.
4. As oxygen and carbon dioxide both have to be transported by the blood, the heart has different chambers, the left and the right, to prevent oxygen rich blood from mixing with the blood containing carbon dioxide.
5. The left half carries oxygenated blood whereas the right half carries deoxygenated blood. Such separation allows a highly efficient supply of oxygen to the body.
6. This is very essential in animals that have high energy needs, such as birds and mammals, which constantly use energy to maintain their body temperature.
7. Each half is further divided into two chambers. The upper one is called atrium and the lower one is termed as the ventricle. Therefore the human heart has four chambers.
8. There are valves between the atria and ventricles which ensure that the blood does not flow backwards.
