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Today I am going to show you 4 body systems inside our body.
The brain,the most important organ in our body belongs to the nervous system.The nervous system sends and collects signals to and from the body and without it we can do nothing.So the Nervous system is known to be the most important system in the body.
You know the heart pumps blood to the whole body and it belongs to the circulatory system.You can't live without it.First the deoxygenated blood starts at the right atrium then it enters the right ventricle then it enters the lungs to get the blood oxygenatated and sends the blood cells tothe left atrium to right ventricle then goes to the whole body and goes back to the right atrium and back to the starting and it kepps going on and on.
The digestive system digests your food. It starts from mouth which breaks down food with the help of saliva then to esophagus then to the stomach which melts the food and goes to small intestine which takes the nutrients from the food and the large intestine which absorbs the water and all of it comes out of anus.
The respiratory system sends oxygen to your body.It starts from the nose when you inhale the air goes inside the Trachea(windpipe) to the bronchi and with the help of bronchioles it goes to the lungs and the diaphragm tells to inhale Oxygen and exhale Carbon Dioxide.
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