“Your body’s circulatory system consists of your heart and blood vessels. They use blood to bring your cells what they need and take away what they don’t.

Your heart pumps blood through the far-reaching, intricate network of arteries and veins. Your blood delivers oxygen and nutrients to your body’s muscles, tissues and organs. This network also removes waste and takes it to organs that can get rid of it.

People often refer to the circulatory system as the cardiovascular system. They are different names for the same system.

Day and night, even when asleep, your heart moves blood through your body in a circuit or like water pipes. If you follow the blood through your body, it moves from your heart into big highways for blood called arteries that deliver blood to your organs and tissues.

In your tissues, blood oxygen is exchanged for waste in tiny networks of blood vessels called capillaries. After leaving the tissues and organs, your blood returns to your heart through veins with more C02/less 02 and to the kidneys to toxics developed. The blood travels through your heart and lungs to get oxygenated again and repeat the process  just like to the kidneys with more 02 but takes wastes in the blood away=Co2 (the other wastes leave the body via urine). This happens thousands of times each day, with every beat of your heart=our engine to the body.

Your heart circulates about 2,000 gallons (more than 7,500 liters) of your blood every day.”

Cleveland Clinic (How Your Circulatory System Works)

“Blood is mostly fluid. But it also contains cells and proteins that make it (literally) thicker than water. The average adult male has about 5 liters (10.5 pints) of blood. Females have about 4 liters (8.5 pints). Blood makes up about 8% of your body weight:

• Plasma makes up about 55% of your blood.
• Red blood cells make up about 44% of your blood.
• White blood cells and platelets make up about 1% of your blood.”

Cleveland Clinic (Blood: What It Is & Function)