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How the human body works
Transcript of How the human body works
In an adult human body, there are about 208 bones. However, in a baby's body, there is an average of 300 - 350! This is because a lot of bones merge together as a person gets older and as a result, there are less bones.
Calcium is very good for your bones. Bones will be stronger if you drink milk and other sources of calcium.
The Muscular System
Our brains are so complicated that there are some parts in it that scientists still don't understand. However, scientists know that our brain has the same general structure as most mammals, but compared to the size of our bodies, it is larger than any other. Here is a diagram of the different parts of the brain
Our digestive system
Our Heart and Lungs
Our heart and lungs are the most important things in our bodies besides our brain. Our hearts are the parts of our bodies that pump blood through all the blood vessels in our bodies. Our lungs are the parts of our bodies that puts oxygen in our blood cells. Our lungs wouldn't work if we didn't have a diaphragm. Our diaphragm is the part of our bodies that pumps our lungs.
In our muscular systems, there
are three different types of muscles
there are smooth muscles, skeletal muscles,
and cardiac muscles. Here is some information about them.
Smooth muscles are muscles we can't control. Because of this, they are sometimes called "involuntary muscles." Smooth muscles surround organs like our stomach, lungs and intestines.
Skeletal muscles are muscles that surround our bones. They are also the muscles that let us move our bodies.
Cardiac muscles are also involuntary muscles. However, they are not smooth muscles. In fact, they are definitely the most important muscles in our body! They are so important because they are the muscles that make up the three chambers in our hearts and pump blood through them.
The Five Senses
Human bodies have five important senses. They are our senses of sight, smell, touch, taste, and hearing.
Our Sense of Smell
Our sense of smell is very closely intertwined with our sense of taste. However, they are very different. Our sense of smell is in our nose and brain. Usually, when we smell something, like some kind of food, it will taste somewhat like it smelled.
Our sense of taste
Our sense of taste comes from our tongue and our brain. We use our sense of taste to taste things, like food. Isn't that AMAZING? Also, even though the sense of taste is the most simple sense of the 5
senses, scientists know the least about it!
Our sense of touch
Our sense of touch is the only sense out of our 5 senses that can be found all over our bodies. This is because it originates in the bottom layer of our skin called the dermis. The dermis is filled with really tiny nerve ends that give your brain information about the things you touch. They can tell your brain if the things you touch are hot, cold if they hurt, and many other things!
Our Sense of Sight
The key to our sense of sight is light. Our eyes cannot and will not work without light. There are many different parts of the eye, as shown in the diagram below.
Our Sense of Hearing
Our ears are what we hear with. Our ears have three sections in them. They are the outer ear, inner ear, and the middle ear. The outer ear is the part we can see and the ear canal. The middle ear starts at the eardrum and goes to three tiny bones inside our ear. Finally, the inner ear is shaped a lot like a snail's shell. It is thge last large part of the ear
Every day, 11.5 liters of food and liquid passes through our digestive systems. Before it gets to our digestive systems,though, it is either cooled or warmed up to a more suitable temperature. In the stomach, enzymes and hydrochloric acid (HCL) break down food and then send it down to the small intestine, where 90 percent of digestion and absorbtion takes place. There are other steps in the digestive system, but as you can see, there's no more room for more writing
That's all for now!
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