Physical Changes
The Cardiovascular System -
The Cardiovascular System is the body system that we use to deliver in oxygenated blood to various cells and organ systems our bodies so that they can undergo cellular respiration. The system passes the correct nutrients, gases, hormones, blood, cells, etc. to and from the body. The Cardiovascular System also moves fluid around the body; these fluids include blood and lymph. Both of these carry the nutrients that we require and that our organs need. The Cardiovascular system using some of the most important organs in the body, it’s made up of The Heart, Arteries, Veins, Capillaries, Blood and the Spleen. The blood is made up of red blood cells, white blood cells and platelets. The red blood cells carry an iron-rich protein that carries oxygen and they are very important to keep the oxygen in the body. The white blood cells defend the body from infections and diseases and are vital to the body as they are the main function in the immune system. And the platelets helps in blood clotting, they help cover up breaks in the body’s tissue or skin. If there are too little platelets excessive bleeding can occur, however, if there are too many platelets blood clotting can occur.
When people age the elasticity of the blood vessels and heart valves decrease. The blood flow also becomes restricted because of the thickening of vessel walls. The vessel walls thicken due to fatty deposits lining on the vessels. This means that the blood flow around an older person’s body is not as strong as it was. This also means that the organs are not getting the right amount of oxygen, blood or nutrients, which can cause them to slow down and not work as well as they should be. The organs can then begin to fail. The lack of blood flow means that nutrients, oxygen, other gases, hormones, blood and cells are not circling the body like they should be. This again is causing