|Geniuses STEM from here|
|The Willard STEM Club||
We can’t see your heart. You may have found it was hard to listen to your heart with your ears placed on the chest of your loved one. We can hear your heart clearly if you have a stethoscope to listen with. But not everyone has one of those at home right? Even though your heart is inside you there is an even easier way to check if your heart is working well. It's called your pulse. Your pulse is a small beat that can be felt by gently pressing or feeling on the skin where we have a large artery. Two good places to find it are on the side of your neck (called the carotid pulse) and the inside of your wrist (called the radial pulse), just below the thumb.
Each beat is caused by the contraction (squeezing) of your heart. Doctors like to use your heart rate as a sign to know if your heart is healthy. To calculate your heart rate count how many beats you can feel during 60 sec. Your heart rate is likely 90-110 beats/min. Try checking the heart rate of one of your parents. Their heart rate is likely 60-100 beats/min. If you have a younger sibling (2yrs or younger) their heart rate is likely 120-140 beats/min. One reason is because the younger you are the more nutrients you need to grow so your heart sends oxygen and nutrients more quickly to your body.
When you run around a lot, your body needs a lot more oxygen to work your muscles. Your heart pumps faster to send the oxygen-filled blood that your body needs to your body. You may even feel your heart pounding faster in your chest.
Journal Activity #2: "Chart Your Heart Rate"- calculate your heart rate with these various activities: 1. standing or sitting still, 2. walking, 3. after jumping rope for 1 min. , 4. your favorite activity: How do they compare? Which activity do you think is the healthiest for your heart? The least healthiest for your heart? How does your favorite activity compare to the healthiest activity?