My Heart

My Heart

My doctor checks to see if my heart sounds healthy. She listens to my heart, and I stay quiet and still.

She hears the healthy sound lub-dub, lub-dub.

My heart needs to be healthy to move blood around my body. My heart needs to work hard for me, even when I sleep.

Blood is how my body moves many things it needs, such as oxygen and nutrients. It is also how my body moves around some of its waste.

My heart doesn't make blood, but it does keep my blood moving. My heart is made mostly of muscle. Each time my heart muscle squeezes, it moves blood.