Carefully study the diagram of the human heart with labels (I), (II), ...
Identification and Functions of the Parts of the Human Heart
(I) Pulmonary Artery
The correct identification for (I) is
Pulmonary artery. Its main function is to
carry deoxygenated blood from the heart to the lungs.
- The pulmonary artery is a large blood vessel that originates from the right ventricle of the heart.
- It carries deoxygenated blood, which is low in oxygen and high in carbon dioxide, away from the heart and towards the lungs.
- The deoxygenated blood is transported to the lungs where it undergoes oxygenation through the process of respiration.
- In the lungs, the carbon dioxide is removed from the blood, and oxygen is added to it.
- After oxygenation, the blood returns to the heart via the pulmonary veins.
(II) Pulmonary Veins
The correct identification for (II) is
Pulmonary veins. Its main function is to
carry oxygenated blood from the lungs to the heart.
- The pulmonary veins are a network of blood vessels that collect oxygenated blood from the lungs.
- They carry oxygen-rich blood, which is high in oxygen and low in carbon dioxide, back to the heart.
- The oxygenated blood from the lungs is returned to the left atrium of the heart.
- From the left atrium, the blood is pumped into the left ventricle and then pumped out to the rest of the body through the aorta.
(III) Aorta
The correct identification for (III) is
Aorta. Its main function is to
carry oxygenated blood from the heart to the body parts.
- The aorta is the largest artery in the body, originating from the left ventricle of the heart.
- It carries oxygenated blood, which is high in oxygen and low in carbon dioxide, to all parts of the body.
- The oxygenated blood is distributed to various organs, tissues, and cells through smaller arteries and arterioles.
- The aorta plays a crucial role in supplying oxygen and nutrients to the body's cells and removing waste products.
(IV) Vena Cava
The correct identification for (IV) is
Vena Cava. Its main function is to
carry deoxygenated blood from the body parts to the heart.
- The vena cava consists of two main veins: the superior vena cava and the inferior vena cava.
- The superior vena cava collects deoxygenated blood from the upper body, including the head, neck, and arms.
- The inferior vena cava collects deoxygenated blood from the lower body, including the abdomen and legs.
- Both the superior and inferior vena cava transport the deoxygenated blood back to the right atrium of the heart.
- The deoxygenated blood is then pumped into the right ventricle and sent to the lungs through the pulmonary artery for oxygenation.
By understanding the functions of these different parts of the human heart, we can appreciate the complex and vital role they play in the