Welcome to another blog-post. In Physical Education we were taught about the Cardio-Vascular, and were given a research project, we had to research the question below and be able to understand and explain about the Cardio-Vascular System.
The cardio-vascular system refers to the heart, blood vessels and the blood. Blood contains oxygen and other nutrients which your body needs to survive. The body takes these essential nutrients from the blood.
Your heart is a muscle. It's located a little to your left of the middle of your chest, and it's about the size of your fist. But the heart muscle is special because of what it does. The heart sends blood around your body. The blood provides your body with the oxygen and nutrients it needs. It also carries away waste.
Why do we need blood to be pumped around the body?
The main reason of your heart is to pump blood to the organs and tissues of your body that requires the oxygen and nutrients it provides. Oxygen-rich blood is pumped out of the left side of your heart into the arteries to these tissues and organs.
What is Blood Pressure?
Blood pressure is a measurement used in medicine. In the body, the arteries carry blood away from the heart. As blood travels through the arteries, it presses against the walls of the arteries. Blood pressure measure how hard the blood is pushing against the walls of the arteries.
Why does your pulse increase when you exercise?
When you are exercising, your muscles need extra oxygen - some three as much as resting muscles. This need means that your heart starts pumping faster, which makes for a quicker pulse. Meanwhile, your lungs are also taking in more air, hence the harder breathing.
References:
- www.scientificamerican.com
- Kidshealth.org
- www.heartfoundation.org.nz
- www.webmd.com
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