Body Systems by Twinkie

There are 11 different body systems in the body that are all vital to survival. The first one that we’re going to cover is going to be the circulatory system. The main organs of the circulatory system are the heart and lungs. They are the most important because they pump blood through the body and make it so the blood is oxygenated so it can be used.

            The main things you will need to know about the circulatory system is that the right half of your heart deals with deoxygenated blood or blood that contains no oxygen, and the right half deals with oxygenated blood which is sent through arteries to muscles and oxygen is diffused into them in the capillaries, where it is then returned to the heart which pumps it back to the lungs for the whole cycle can start again.

            The next system were going to talk about is the respiratory system. The respiratory system is what gives your blood oxygen and keep you alive. The respiratory system is made up of your trachea, your larynx, your bronchi and bronchioles, your lungs and alveoli. The way the system works is that your diaphragm sucks air into your lungs through your trachea, where it is filtered by the larynx and split into both of your lungs by the bronchi, where they travel down the bronchioles to your alveoli, where gas exchange happens and the co2 is diffused out of your blood and o2 is diffused into your blood. After the gas exchange, your diaphragm contracts and pushes all of the co2 out of your lungs and the whole process starts again.

                        Another system is the digestive system. The digestive system is the system responsible for breaking down food and absorbing nutrients so your body can grow and to keep you energized. The main organs of the digestive system are the esophagus, the stomach, the liver, the pancreas, gallbladder, and the small and large intestines. Once you take a bite of food and it travels down your esophagus, it is digested and turned into a soup of nutrients and water. Then it is sent to the small intestines where the nutrients are absorbed and some of the water. Once the leftover waste is sent to the large intestine where the water is absorbed out and sent back throughout the body.

Another major system and the last of the 11 that we’re going to cover is the nervous system. The nervous system is arguably the most important system in the body, for without it, our bodies have now source of power and no movement. The main organs of the nervous system are the brain, the brainstem, the spinal cord, and nerves. The way the system works is a message is sent out from your brain for you to, for example, type on a keyboard. So the message is sent down into the spinal cord through the brainstem, where the message begins its journey to your hands where the electric impulse from the nerves in your hands are translated into movement causes your muscles in your hands to move which allows you to accurately type each key and even move your hands.

Questions:

1.    What are the main organs of the circulatory system?

2.    What is the main function of the circulatory system?

3.    How does your respiratory system work?

4.    What gases are involved in gas exchange?

5.    What do your small intestines do?

Some fun facts about the three systems are that your heart beats more than 3 billion times during your whole life. You eat around 1 ton of food a year. The most interesting fact though is that your body radiates about 100 watts of electricity at any point.