Final answer:
The left pulmonary surface of the heart is composed of the left atrium, which receives oxygenated blood from the pulmonary veins and conveys it to the left ventricle.
Step-by-step explanation:
The left pulmonary surface of the heart is primarily made up of the left atrium. After the exchange of gases in the pulmonary capillaries, oxygen-rich blood is returned to the left atrium through one of the four pulmonary veins. This chamber acts as a collection point before the blood is pumped into the left ventricle, signifying that the correct answer to the question is option (a) Left atrium.
To further clarify related concepts, the left atrium initially receives blood from the systemic circuit. This oxygen-rich blood then passes through the mitral valve into the left ventricle, which pumps it into the aorta to supply the various tissues of the body.
Here is a simplified order in which blood flows from the heart to the body and back:
- Arteries
- Capillaries
- Venules
- Veins
- Aorta