A Guide to Your Body's Body Systems
The Systems of your Body By: Nathan F.
The Digestive System
Then the journey through your small intestine starts! The food starts to travel through in a way known as peristalsis, which is the wavelike contraction of muscles in the small intestine that keep the food moving. The reason it keeps the food moving, because it rubs the food onto the sides of the intestine, which have some things called villi. These take the energy, that is being giving to them from the sugar.
The Circulatory System
The only part of the Circulatory system I haven't talked about is your Heart. It uses strong muscles to pump your blood through your body, which is why it is at the near center of your body. An alternate to red cells, are the white cells. These fight infection, and mix with the red cells in the blood stream. Another thing to help with wounds is the platelets, these clot blood up in your wounds, which eventually dry and scab over. This allows the wound to heal.
The Respiratory System
When you breathe in, tiny hairs in your noes filter the air, and in the back of your nose it heats the air. The warm air then travels down your trachea, or to put it to terms you probably know, your windpipe. The large things that branch off from the windpipe, are called your lungs, as you probably know. Or you should know. These contain your alveoli
The Skeletal System
Your skeletal system does more than you think it does! It holds your body together, and keeps you from just shambling around as that blob you'd be! But bones can't just do everything, they need your muscles to work. They work together really well, as you'll learn in about a second!
The Muscular System
Some other types of muscles are smooth muscles, which mostly make up the walls of important organs in your body. The other kind of muscle is called cardiac muscle, these are what makes up the walls of your heart. They are strong, mainly because they pump all your blood around your body. And when you think about that, they have to be pretty strong because your body is made up of about 60% water! That counts blood!