The Body Systems

Circulatory, Cardiovascular, and Nervous systems.

Circulatory System

The circulatory system helps the circulatory system series as the transportation system of the body. It is a continuous travel of the blood flow from the heart going to the different body cells, then going back to the heart. Along with the blood, the circulatory system carries as well as distributes the digested foods, water and oxygen to the different cells in the body. It also collects waste from the cells such as carbon dioxide. Through the circulatory system, the oxygen is transported to the lungs by the blood and the carbon dioxide is collected sending them of to the body& organs. The digested food from the intestine is also absorbed; then it is carried to the cells. The circulatory system also functions to help maintain body pressure as well as helping to fight disease-causing organisms. The system has three major parts; the heart, the blood,and the lungs. Each plays important roles in the circulation processes. The heart is responsible for the movement of the blood. It acts like a pump. There is about 13,000 quarts of blood being pumped by the heart in one day. The blood vessels serves as the passageway or pathways for the blood through out the entire body. There are three types of blood vessels; the arteries, the veins, and the capillaries. The arteries are responsible for carrying the blood back to the heart. The capillaries are responsible for carrying blood that is rich in oxygen to the different body tissues as well as in carrying out waste products from the cells.

The Nervous System

The way the nervous system works is truly unique and complex. It works through a complex network of neurons, which are the basic functioning cells of the nervous system. The neurons conduct the signals or impulses between the two components of the nervous system, the central and the peripheral nervous system. There are mainly three types of neurons, sensory neurons, motor neurons, and interneurons.The sensory neurons transmit the stimuli or impulses received from the sensory organs, like the eyes, nose or skin, to the central nervous system, to the brain and the spinal cord. The brain in turn, processes these stimuli and sends them back to other parts of the body, telling them how to react to a particular type of stimulus. The motor neurons are responsible for receiving signals from the brain and spinal cord, and sending them to other parts of the body.

Cardiovascular System

Your heart and circulatory system make up your cardiovascular system. Your heart works as a pump that pushes blood to the organs, tissues, and cells of your body. Blood delivers oxygen and nutrients to every cell and removes the carbon dioxide and waste products made by those cells. Blood is carried from your heart to the rest of your body through a complex network of arteries, arterioles, and capillaries. Blood is returned to your heart through venules and veins. If all the vessels of this network in your body were laid end to end, they would extend for about 60,000 miles (more than 96,500 kilometers), which is far enough to circle the planet Earth more than twice!The one-way circulatory system carries blood to all parts of your body. This process of blood flow within your body is called circulation. Arteries carry oxygen-rich blood away from your heart, and veins carry oxygen-poor blood back to your heart.In pulmonary circulation, though, the roles are switched. It is the pulmonary artery that brings oxygen-poor blood into your lungs and the pulmonary vein that brings oxygen-rich blood back to your heart.In the diagram, the vessels that carry oxygen-rich blood are colored red, and the vessels that carry oxygen-poor blood are colored blue.Twenty major arteries make a path through your tissues, where they branch into smaller vessels called arterioles. Arterioles further branch into capillaries, the true deliverers of oxygen and nutrients to your cells. Most capillaries are thinner than a hair. In fact, many are so tiny, only one blood cell can move through them at a time. Once the capillaries deliver oxygen and nutrients and pick up carbon dioxide and other waste, they move the blood back through wider vessels called venules. Venules eventually join to form veins, which deliver the blood back to your heart to pick up oxygen.
The 13 cardiovascular steps song!