¿Por qué late el corazón?

The video tutorial explains how a pump works by using air to inflate a tire, and draws a parallel to how the heart functions as a pump to circulate blood throughout the body. It describes how the heart rate varies with different activity levels, such as resting and exercising, and concludes by reinforcing the analogy between a bicycle pump and the heart.

What happens when you squeeze a bicycle pump?

• It deflates the tire.

• It releases air into the atmosphere.

• It stops working.

• It pushes air into the tire.

How does the heart function similarly to a pump?

• It inflates the lungs.

• It stores energy.

• It circulates blood throughout the body.

• It filters air.

What happens to the blood after it is pumped by the heart?

• It exits the body.

• It evaporates.

• It stays in the heart.

• It returns to the heart.

How does the heart rate change when you are resting?

• It beats faster.

• It beats irregularly.

• It beats slower.

• It stops beating.

Why does the heart beat faster during exercise?

• To cool down the body.

• To pump blood faster to the body.

• To conserve energy.

• To reduce stress.