4. Which of the following describes the path of blood between the heart and the lungs? (1 point)

heart → lungs (capillaries) → veins → arteries → heart
heart → arteries → veins → lungs (capillaries) → heart
heart → arteries → lungs (capillaries) → veins → heart
heart → veins → lungs (capillaries) → arteries → heart

To determine the correct path of blood between the heart and the lungs, we need to understand the circulatory system.

The circulatory system consists of the heart, blood vessels, and blood. It plays a crucial role in transporting oxygen, nutrients, hormones, and waste materials throughout the body.

The heart acts as a pump that propels blood through two main circulatory pathways: the pulmonary circulation and the systemic circulation.

In the pulmonary circulation, deoxygenated blood is pumped from the heart to the lungs to pick up oxygen and release carbon dioxide. The correct path of blood between the heart and the lungs is:

heart → arteries → lungs (capillaries) → veins → heart

Here's a step-by-step explanation of the path:

1. The heart pumps deoxygenated blood into the pulmonary arteries.
2. The pulmonary arteries carry this blood from the heart to the lungs.
3. Inside the lungs, the arteries branch into smaller vessels called capillaries. This is where the exchange of oxygen and carbon dioxide takes place.
4. Oxygen-rich blood is then collected by pulmonary veins.
5. The pulmonary veins carry the oxygenated blood back to the heart, specifically, the left atrium.
6. From the left atrium, the oxygenated blood is pumped to the rest of the body through the systemic circulation.

To summarize, the correct answer is:

heart → arteries → lungs (capillaries) → veins → heart

Blood always leaves the heart in arteries and returns to the heart in veins.