ClassX Video Lessons Youtube Channel Smile and Learn English Human body organs for kids – Circulatory system, digestive system and respiratory system for kids
Welcome to the amazing world of the human body! Today, we’re going to explore three important systems: the circulatory system, the digestive system, and the respiratory system. Let’s dive in and learn how they work together to keep us healthy and strong!
The circulatory system is like a superhighway for your blood. At the center of this system is the heart, a powerful muscle that pumps blood all around your body. Your heart is about the size of your fist and is located in the middle of your chest, slightly to the left.
Blood is made up of red blood cells, white blood cells, and platelets. Red blood cells carry oxygen to all the cells in your body, which they need to produce energy. White blood cells are like tiny soldiers that fight off germs and keep you healthy. Platelets help your blood clot when you get a cut, so you don’t lose too much blood.
Blood travels through tubes called blood vessels. Arteries carry blood away from the heart, while veins bring it back. Capillaries are tiny vessels where oxygen and nutrients are exchanged with cells. This whole process ensures that your body gets the oxygen and nutrients it needs to function properly.
The respiratory system is all about breathing. It brings oxygen into your body and gets rid of carbon dioxide, a waste product. Breathing happens automatically, so you don’t even have to think about it!
When you breathe in, air enters through your nose, where tiny hairs clean and warm it. The air then travels down the pharynx, larynx, and trachea, which splits into two bronchi leading to the lungs. Inside the lungs, air moves through smaller tubes called bronchioles.
Your lungs are the main organs of the respiratory system. They take in oxygen and send it to your blood, which carries it to all your cells. The diaphragm, a muscle under your lungs, helps you breathe in and out. It’s important to avoid smoking and pollution to keep your lungs healthy.
The digestive system is like a food factory. It breaks down the food you eat so your body can use it for energy and growth. Digestion starts in the mouth, where your teeth chew food and mix it with saliva to form a soft ball called a bolus.
The bolus travels down the esophagus to the stomach, where gastric juices turn it into a liquid called chyme. This chyme moves into the small intestine, where most digestion happens. The pancreas and liver release juices that help break down fats and carbohydrates.
In the small intestine, nutrients are absorbed into the blood. Anything left over moves to the large intestine, where water is absorbed. Finally, waste is expelled from the body through the rectum and anus. Eating a balanced diet, drinking water, and exercising are important for a healthy digestive system.
Now you know how these three systems work together to keep you healthy! Keep exploring and learning more about your amazing body!
Heart Beat Experiment: Find your pulse on your wrist or neck. Count how many times your heart beats in one minute while sitting still. Now, do some jumping jacks or run in place for a minute, then count your heartbeats again. Discuss with a friend or family member why your heart beats faster after exercise. This will help you understand how the circulatory system works harder to deliver oxygen to your muscles when you’re active.
Breathing Buddy: Pair up with a friend or family member and take turns being the “Breathing Buddy.” One person will lie down and place a small stuffed animal on their belly. As you breathe in and out, watch the stuffed animal rise and fall. This shows how your diaphragm helps you breathe. Try taking slow, deep breaths and then quick, shallow breaths. Talk about how different breathing patterns feel and why deep breathing might be calming.
Digestive System Journey: Create a simple map of the digestive system using paper and crayons. Draw the path food takes from the mouth to the stomach and through the intestines. Use different colors to show where digestion and absorption happen. As you eat your next meal, think about each step your food takes in your body. Share your map with someone and explain what happens at each stage of digestion.
Sure! Here’s a sanitized version of the transcript:
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[Music] Welcome to the circulatory system! This is the heart, the driving force of the whole system. The circulatory system brings blood to all parts of your body. It’s important to exercise and eat healthy foods to take care of your circulatory system.
The heart is a muscle, and every beat pushes blood through your entire body. Close your fist; that’s how big your heart is! It’s located slightly to the left and in the middle of your chest. Now that you’ve learned about the heart, let’s see what your blood does.
[Music] Hi, I’m a red blood cell, and I deliver oxygen to cells, which is their main energy supply. These are white blood cells, and they’re responsible for fighting off foreign substances. [Applause] These are platelets; their job is to repair veins and arteries when you cut yourself, keeping the blood inside where it belongs. Together, we make up blood, the red fluid that comes out when you cut yourself.
Our journey starts and ends in the heart. Blood is delivered to the entire body through blood vessels, which are tubes that transport it. Arteries are the vessels that carry blood from your heart to your organs and cells. Capillaries are small vessels where oxygen and nutrients are exchanged. Veins are the vessels that return blood to your heart from your organs. This process ensures that cells and organs receive the food and oxygen they need to survive.
Then, red blood cells collect waste and carbon dioxide from the cells. Here we are at the heart; this is where our trip ends before we start a new journey. Let’s get loaded up with oxygen and nutrients. Thanks for helping us out! See you soon. [Applause]
The respiratory system extracts oxygen from the air, which our cells need to live and grow. It also eliminates carbon dioxide produced by cells after using oxygen. This process is known as respiration, which is automatic and involuntary.
Air enters through your nose and encounters tiny hairs that moisten, heat, and clean it to keep dirt out of your lungs. The air continues down the pharynx, larynx, and then the trachea. The trachea, or windpipe, splits into two to form the bronchi inside the lungs. Once the air is inside the lungs, it travels through pathways called bronchioles.
Your lungs are the most important organs in respiration; they take in oxygen from the air and expel carbon dioxide that your body doesn’t need. The alveolar sacs take that oxygen and send it to the blood for distribution throughout all the organs and cells of our body. The diaphragm, located under your lungs, helps fill the lungs with air when you inhale and expels the air your body doesn’t need when you exhale.
The air we exhale contains carbon dioxide and waste, and it is warm. You can feel the heat if you put your hand over your mouth when you breathe out. [Music] Smoking and pollution can harm your respiratory system. Exercise and breathing clean air are essential for taking good care of it.
Digestion is the process by which food is transformed so that it can be absorbed and used by the body’s cells. [Music] Digestion starts in the mouth with chewing and salivation. Teeth are used to chew and mash up the food. [Music] The salivary glands produce saliva to soften food. The tongue moves the food around, mixes it with saliva, and forms a bolus.
The pharynx has a valve that opens to swallow, and then the bolus moves on to the esophagus. The bolus travels through the esophagus until it reaches the stomach. The stomach secretes gastric juices that continue the digestion process, and this mass is known as chyme. Chyme crosses the pylorus on its way to the small intestine. [Music]
Most digestion occurs in the small intestine, where the pancreas and liver release juices to process fats and carbohydrates. Here, the substances the body needs are absorbed and passed on to the blood. [Music] Any substances the body has not yet absorbed go to the large intestine, where the body absorbs the substances it needs and water. [Music]
The rectum and anus are the final parts of the digestive system, where substances the body does not need are expelled. A healthy diet, drinking water, and plenty of exercise are key to taking good care of your digestive system. [Music]
If you want to learn more, click on more videos and subscribe to the Smile and Learn channel to stay updated with new adventures. [Music]
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