CIRCULATORY SYSTEM - DESCRIPTION
The Circulatory system transports nutrients, water, and oxygen to your billions of body cells and carries away wastes such as carbon dioxide that body cells produce.
IMPORTANT PARTS
- Heart
- Blood
- Blood Vessels
FUN FACTS
- You have thousands of miles of blood vessels in your body.
- You could wrap your blood vessels around the world twice
- Your heart will beat about 3 BILLION times during your lifetime!
- It takes about 20 seconds for a red blood cell to circle the whole body.
- contains three main parts - the heart, the blood and blood vessels such as the arteries, capillaries and veins.
- Arteries carry blood away from the heart and could circle the world twice!
- Veins carry blood back to the heart and could stretch halfway around the planet!
- Capillaries connect the Arteries and Veins and are around 50,000 to 60,000 miles long!
- Within a tiny droplet of blood, there are some 5 million red blood cells.
- The task of red blood cells is to deliver oxygen to the organs of the body.
- The task of the white blood cells is to defend the body against any infection and disease.
- The task of the Platelets is to help stop bleeding
- The Circulatory System works with the Digestive System by taking the energy from the digestive system and moving it into the cells and also to move the waste from the cells and eliminate them.
- explaining pulmonary circulation
Function of the Heart
The role of the heart is to pump oxygen-rich blood to every living cell in the body. In order for the heart to deliver oxygenated blood to all cells, blood is pumped through arteries. Veins bring deoxygenated blood cells to the lungs, which then are oxygenated, and then sent back to heart. In this way, a continuous cycle is formed of the heart pumping oxygenated blood and deoxygenated blood out to their designated destinations, and therefore the heart maintains the circulatory system.
WHAT IS A CALORIE?
A calorie is a way to measure the amount of fuel our body is using. Much like cars use gas to power them, our bodies use the food we eat like pizza to fuel all of our actions from breathing, sleeping, thinking to running writing and talking. A calorie tells us how much energy something can potentially give us. When something contains 200 calories, it's a way of describing how much energy your body could get from eating or drinking that item.