The Fibrous skeleton of the heart is formed from dense irregular connective tissue.
The cardiovascular (circulatory) system is made up of the heart and blood arteries. The heart sends blood to the lungs to gather up oxygen before returning oxygen-rich blood to the body. The blood circulating in this system distributes oxygen and nutrients to the body's tissues while also removing waste products (such as carbon dioxide).
The heart is a hollow muscular organ at the center of the chest. The heart is divided into two sides, right and left. The heart's right and left sides each have an
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