write the working of human heart
Answers
Answer:
The Working Heart
Heart & Vascular
The heart is a muscular organ that pumps blood continuously throughout the body. It is comprised of four chambers — the right and left atrium and the right and left ventricle.
The chambers of the heart work together by alternately contracting and relaxing to pump blood throughout the heart. To accomplish this, the heart uses an electrical system to trigger a heartbeat. Essentially, the electrical system is the power source that makes all the heart's functions possible.
Blood vessels lead in and out of the chambers, which receive and distribute blood throughout the body. The four chambers are connected by four valves — the tricuspid, pulmonic, mitral and aortic valves. These valves work like one-way doors, allowing blood to flow in only one direction.
Blood Circulation
Blood Circulation imageAs the heart beats, it pumps blood through a system of blood vessels called the circulatory system. The blood that these vessels carry is essential for the body to function. Blood carries oxygen and nutrients to your body's tissues, assists in the removal of carbon dioxide and waste products and promotes the overall health of the body's tissues. There are three main types of vessels that make up this system:
Arteries
Veins
Capillaries
Arteries carry oxygen-rich blood away from the heart to the body's tissues. Veins take oxygen-poor blood back to the heart. Capillaries are small thin blood vessels that connect the arteries and the veins.
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