Pages tagged: circulatory system

Heart Anatomy

Your heart is located between your lungs in the middle of your chest, behind and slightly to the left of your breastbone. A double-layered membrane called the pericardium surrounds your heart like a sac. The heart weighs between 7 and 15 ounces (200 to 425 grams) and is a little larger than the size of your fist.

The heart and circulatory system make up your cardiovascular system. Your heart works as a pump that pushes blood to the organs, tissues, and cells of your body. Blood delivers oxygen and nutrients to every cell and removes the carbon dioxide and waste products made by those cells.

Fetal Heart

The baby growing inside of the mother’s uterus (the womb) is called a fetus. The growing fetus is fully dependent...