Circulatory System Functions and Structures

The cardiovascular system is divided into systemic and pulmonary parts. Systemic circulation carries oxygen-rich blood from the heart to body tissues and returns oxygen-poor blood to the heart. Pulmonary circulation transports oxygen-poor blood from the heart to the lungs for gas exchange, returning oxygen-rich blood to the heart. The systemic circulation involves the aorta and its branches, while the pulmonary circulation involves the pulmonary trunk and arteries.

What is the primary function of the systemic circulation?

• To carry blood from the heart to the lungs

• To transport oxygen-rich blood to body tissues

• To exchange carbon dioxide for oxygen in the lungs

• To pump blood from the right ventricle

Which part of the aorta supplies blood to the head and neck?

• Aortic arch

• Descending aorta

• Pulmonary trunk

• Superior vena cava

What happens in the systemic capillaries?

• Oxygen is exchanged for carbon dioxide

• Blood is pumped into the pulmonary trunk

• Oxygen-rich blood enters the left atrium

• Carbon dioxide is exchanged for oxygen

Through which vessels does oxygen-poor blood enter the right atrium?

• Pulmonary veins

• Superior and inferior vena cava

• Pulmonary arteries

• Aortic arch

What is the role of the pulmonary circulation?

• To pump blood from the left ventricle

• To supply blood to the lower limbs

• To transport oxygen-poor blood to the lungs for gas exchange

• To carry blood from the heart to body tissues

Where does the oxygen-rich blood go after gas exchange in the lungs?

• Right atrium

• Left atrium

• Left ventricle

• Right ventricle

Which arteries transport blood to the lungs?

• Pulmonary arteries

• Aortic arch

• Descending aorta

• Superior vena cava

What divides into the right and left pulmonary arteries?

• Superior vena cava

• Descending aorta

• Pulmonary trunk

• Aortic arch