circulatory system

 

the parts are:

 

The blood delivers the nutrients and the oxygen to all cells in the body.

 

As the heart beats it pumps blood through a system of blood vessels called the circulatory system the vessels are elastic , muscular tubes

  that carry blood every part of the body blood is esential .in addition to carrying fresh oxyen from the lungs and nutrients to your bodys tissues tissues it also takes  the bodys waste products including carbón dioxside away from the tissues this tissues it also takes  the bodys waste products including carbon dioxide away from the tissues this is necesary to sustain life and promote the health of all  the bodys tissues there are three main types of blood vessels:

arteries they begin with the aorta the large artery leaving the heart arteries carry oxygen rich blood away from the heart to all of the bodys tissues they branch several times ,becoming smaller and smaller as they carry blood further from the heart and into organs.

capillaries these are small thin blood vessels that connect the arteries and the venis their thin  walls enable oxygen nutrients carbón dioxide and other wate products to pass to and from our organs cells .

veins, these are blood vessels that take blood back to the heart  this blood has a lower oxygen content and is risch in waste products that will be excreted or removed from the body veins become larger as they get closer to the heart the superior vena cava is the large vein that brings blood from the head and arms to the heart, and the inferior vena cava brings blood  from the abdomen and legs to the heart

 

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