Circulatory

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Circulatory

  1. 1. Circulatory/Cardiovascular System Besides controlling blood pressure and moving blood throughout the body it……
  2. 2. Circulatory/Cardiovascular System The main function of the circulatory system is to provide nutrients and oxygen to the various parts of the body, via the blood, which is circulated through the veins and arteries, like a giant transportation system. Arteries carry the oxygenated blood from the heart to the cells and tissues, whereas veins return the oxygen-depleted blood from the cells to the heart.
  3. 3. The Two forms of Circulation In systemic circulation, arteries collect the oxygen-rich blood from the heart and is transported to the body tissues. In the process, oxygen from the blood is diffused into the body cells; whereas carbon dioxide from the cells is diffused in the blood. This exchange of gases takes place with the help of capillaries that surround the body cells
  4. 4.  The pulmonary circulation is a loop from the heart to the lungs. It is that portion, where deoxygenated blood from the heart is carried to the lungs and in turn, returns oxygenated blood to the heart.
  5. 5.  The circulatory system works with the respiratory system and digestive system to supply oxygen and nutrients to the body. Blood carries the messenger chemicals - hormones, secreted by the organs of the endocrine system. Thus, the circulatory system is also responsible for circulating hormones for proper communication between the body organs.
  6. 6. Circulatory/Cardiovascular System Capillaries (smallest of blood vessels) - Controls flow of oxygen to cells and carbon dioxide from cells using the following feedback loop:  If oxygen too low, gases flow from areas of high concentration (capillaries)to low concentration (cells) to maintain levels  If too high, the opposite happens, gases flow from areas of high concentration (cells) to low concentration (capillaries).
  7. 7. Diseases/affliction of the cardiovascular/circulatory system Heart attack High blood pressure Hemophilia Stroke Sepsis (infection) Bruises/contusions (hickey)

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