Cardiovascular System
Cardiovascular system:
The circulatory system:
The circulatory system is made up of the vessels and the muscles that help and control the flow of the blood around the body. This process is called circulation. The main parts of the system are the heart, arteries, capillaries and veins.
As blood begins to circulate, it leaves the heart from the left ventricle and goes into the aorta. The aorta is the largest artery in the body. The blood leaving the aorta is full of oxygen. This is important for the cells in the brain and the body to do their work. The oxygen rich blood travels throughout the body in its system of arteries into the smallest arterioles.
On its way back to the heart, the blood travels through a system of veins. As it reaches the lungs, the carbon dioxide (a waste product) is removed from the blood and replace with fresh oxygen that we have inhaled through the lungs.
The Heart
The heart is a muscle about the size of an adult fist. It is composed of two sides and four chambers: the left and right atria and the left and right ventricles. The two atria are located on the top of the heart and receive blood from various parts of the body. The two ventricles are located on the bottom of the heart and pump blood away from the heart, to the body. The right ventricle is responsible for pumping deoxygentated blood to the lungs. The left ventricle pumps oxygenated blood to the rest of the body. Between the chambers are valves. Valves control the flow of blood, insuring that it flows in one direction.
The Blood Vessels
Blood vessels are a series of elastic tubing that carry blood to and from the heart. Oxygenated blood leaves the heart and supplies oxygen and nutrients to the body via the arteries. After crossing capillaries, veins return deoxygenated blood and waste products to the heart through the vena cava. After leaving the right ventricle through the pulmonary arteries, the blood gets oxygenated in the lungs, disposes of carbon dioxide from the
The circulatory system:
The circulatory system is made up of the vessels and the muscles that help and control the flow of the blood around the body. This process is called circulation. The main parts of the system are the heart, arteries, capillaries and veins.
As blood begins to circulate, it leaves the heart from the left ventricle and goes into the aorta. The aorta is the largest artery in the body. The blood leaving the aorta is full of oxygen. This is important for the cells in the brain and the body to do their work. The oxygen rich blood travels throughout the body in its system of arteries into the smallest arterioles.
On its way back to the heart, the blood travels through a system of veins. As it reaches the lungs, the carbon dioxide (a waste product) is removed from the blood and replace with fresh oxygen that we have inhaled through the lungs.
The Heart
The heart is a muscle about the size of an adult fist. It is composed of two sides and four chambers: the left and right atria and the left and right ventricles. The two atria are located on the top of the heart and receive blood from various parts of the body. The two ventricles are located on the bottom of the heart and pump blood away from the heart, to the body. The right ventricle is responsible for pumping deoxygentated blood to the lungs. The left ventricle pumps oxygenated blood to the rest of the body. Between the chambers are valves. Valves control the flow of blood, insuring that it flows in one direction.
The Blood Vessels
Blood vessels are a series of elastic tubing that carry blood to and from the heart. Oxygenated blood leaves the heart and supplies oxygen and nutrients to the body via the arteries. After crossing capillaries, veins return deoxygenated blood and waste products to the heart through the vena cava. After leaving the right ventricle through the pulmonary arteries, the blood gets oxygenated in the lungs, disposes of carbon dioxide from the
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