Cardiovascular system facts

Human body consists of many organs that are useful to carry out the functions of the body properly. All organs in the body are very much essential for normal functioning of the human body. In the similar manner, cardiovascular system is the most essential part of the body. It comprises of three main parts: blood, the heart, and the blood vessels – arteries and capillary veins.

The main function of cardiovascular system is to transport oxygen to all other organs of the body. Thus, this process provides sufficient amount of nutrition to several parts of the body. It is the most interesting and essential component of the body. Many researchers and scientist have toiled their life to get all the detailed information about this system. Every part of the system has different facts and functions. Thus, we may discuss here some interesting facts about blood, heart and blood vessels.

Blood:
Blood is the nutrition of the body that provides us energy for survival. Blood is actually a carrier of nutrition and oxygen to all other organs and cells of the body. Some interesting facts will help you to understand the proper functioning of blood.

? Blood is made up of blood cells which are in the form of liquid, known as blood plasma.
• Seven % of the blood comprises in the total weight of the body.
• An adult human body contains an average of five liters of blood.
• There are two types of blood in the body: Red blood cells (RBC) and white blood cells (WBC). Blood even comprises of leukocytes and platelets.
• Hemoglobin is the main component of RBC, which is protein with iron that is very much essential for body to transport oxygen.
• Blood is made up of connective tissues and is generated within bones.

Heart:
The heart is the most important component of the body. It supplies blood and oxygen to all other parts of the body.

? The heart of male weighs approximately 300-350 grams whereas, female heart weight almost 250-300 grams.
• Its size is equivalent to the size of your hand fist.
• The heart is wrapped by double layer sac- Pericardium.
• Our heart is made up of three main parts: Innermost layer ( Endocardium), Middle layer ( Myocardium) and the Uppermost layer( Visceral layer)
• Heart comprises of four chambers: two arteries and two ventricles.

Blood vessels:
Blood vessels transport blood to the heart and other organs of the body.

? The blood vessels in divided into three types: veins, capillaries and arteries. Each blood vessel carries out an important function of the body. The veins transport blood cells to the heart while, arteries pull away the blood from the heart. The Capillaries exchange chemicals with water.
• Aorta is the largest artery in the blood vessels that transports the blood from the heart. It is divided into: carotid artery, celiac trunk, renal artery, iliac artery, subclavian artery, and mesenteric arteries.

There are some interesting facts of cardiovascular system:
• Our heart beats for seventy two times in a minute- 60 seconds.
• The blood plasma contains almost ninety two % of water and eight % of plasma proteins.
• The length of our blood vessels is about sixty thousand miles long