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Asked by ddunlap45 - 5 years ago
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Richard Level 79 / Retired Dentist
Answered 5 years ago
A single human life relies heavily on the beating of one particular organ, the heart. On average an individual human heart beats 700,000 times a week and pumps an average of 42,000,000.00 (42 million) gallons of blood throughout the body, in a single life span. At any one time, the human body holds approximately 6 quarts of blood and circulates it continuously through the body. The role of the circulatory system in the human body is one of great importance for survival.
The cardiovascular system functions can be categorized into three main functions: transport, regulation and protection.
Protection: The cardiovascular system performs the function of protecting the body and its organs from infection and diseases by providing white blood cells that have the ability to fight against them. Proteins and antibodies required for destroying viruses, bacteria and disease causing germs are also provided by this system to the various parts of the body. Another important function of this system is to protect the body from excessive blood loss through the process of blood clotting during an injury.
Transport: The cardiovascular system transports oxygen from the lungs to the various cells of the body. The primary function of the cardiovascular system is to transport nutrients from the intestines to the lungs and other parts of the body, and carbon dioxide from the cells to the lungs. Hormones from the various endocrine glands and heat from the cells are also transported by this system. Removal of waste products like carbon dioxide and nitrogen from the body is also performed by this system. This function of transport is mainly carried out by the blood and the network of blood vessels present in the cardiovascular system.
Regulation: Another important cardiovascular system function is the regulation of the concentration of hydrogen ions (pH) in the body, the body temperature and body heat, and the regulation of the salt and water content of the cells in the body.
PacoPuddy Level 10
Answered 5 years ago
The circulatory system carries oxygen and food around the body to the organs. It takes away carbon dioxide and toxins.

It also carries antibodies around the body to any area where they may be needed eg if you get an infection.
thinkfirst Level 18 / Scientist
Answered 4 years ago
The circulatory system accesses all areas of the body so various cells and molecules can be delivered to where they are needed

For example red blood cells deliver oxygen from the lungs to distant tissue using the circulatory system
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