Health and Fitness Question 5

The circulatory, respiratory, digestive, and excretory systems are considered transporting systems for the body because, things are moving in these systems. No matter if it is gases, solids, or liquids. In the circulatory system blood is moving. Blood is moving through veins, arteries, and capillaries. In the respiratory system oxygen and carbon dioxide is moving. Oxygen is coming in and carbon dioxide is going out. Oxygen enters the body through the nasal passages and then it goes down the trachea and down to the lungs and these branches branch off until they are really thin. At the end of these really thin branches is something called an alveoli, where oxygen enters the blood through the capillaries surrounding it. These capillaries are also an exit for the carbon dioxide in your blood. When you eat food it goes through your digestive system. Food and chemicals move in the digestive system. It starts in your mouth where saliva breaks down carbohydrates. Then when you sallow the broken down food and saliva goes down the esophagus. Then the stomach brakes the food down a little bit too. Then after it is partly broken down the saliva, chemicals from the stomach, and partly broken down food move to the small intestine. Where the gallbladder, the pancreas, and small intestine release chemicals to finish the job and the chemicals and digested food where it is temporarily stored. Blood and wastes moves in the excretory system. Blood goes through nephrons that are found n the kidneys. Nephrons remove wastes and excess water from the blood and the cleaned blood goes through the kidneys and stays in the body. the mixture of wastes and water is stored in the bladder until it leaves the body. That is why they are considered transport systems.