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Julia L.The Body Systems
Transcript of Julia L.The Body Systems
By: Julia L.
How digestion starts: First, the food goes down your
esophagus. The esophagus has muscles that push your food down. Just like squeezing a tooth paste. Then, it gets to your stomach. Inside your stomach, there are digestive juices that mixes with your food. Next, your food goes to your small intestine.Inside your small intestine there are tiny finger-like villi that sends all the nutrients of your food to your blood. The waste goes to your large intestine and then it gets to your rectum. Finally, it is time to go to the bathroom.
The heart is the main part of the circulatory system. The heart is important to us because it pumps he blood for us. If the heart didn't do that, we will die. That's why when your heart stops, you die. Inside your heart, there are 4 small rooms called chambers. The chambers on the right side of your heart take the blood that has already moved through your body. The blood coming back to the heart from your body is blue because it has no oxygen . Each time you breathe, your lungs fill with oxygen. The heart pumps blue blood to your lungs to take in oxygen. When it gets oxygen, your blood turns red. The red blood is pumped into the chambers on the left side of your heart.Then, your heart pumps the blood with oxygen to the rest of your body.
Your blood also carries nutrients to give you energy. Your body will stop working if it didn't have oxygen or nutrients. The blood flows through tubes called blood vessels. If you see dark lines under your skin, those are your blood vessels. The blood vessels that carry your blood away from your heart are called arteries. The blood vessels that carry blood from your body into your heart are veins.
Did you know that your body has 206 bones? That's amazing, right? Most animals and everybody have skeletons. A skeleton is the frame that muscles and skin wrap around. Skeletons give vertebrates, including people their shape. Teeth are harder than bones because they are not easy to break. Inside your bones, there is bone marrow. Bone marrow is like gray jelly (eeeewww!!!) If you snap a chicken bone in half, you will see their bone marrow.
Cartilage is softer than bones. If you touch the tip of your nose, you will feel cartilage. If you also touch your ears, you will feel cartilage. There are some types of animals like sharks that have their whole body made of cartilage.