Cardiovascular System Physiology

Cardiovascular PhsyicalThere several critical functions of the body’s cardiovascular system: 1 Transportation of  materials and chemicals, 2) To regulate of the body’s homeostasis levels, 3) Protect the body from pathogens

1. Transporting  materials from one part of the body to other body tissues is a major function of the cardiovascular system. The blood delivers oxygen and essential nutrients, as well as remove waste and carbon dioxide that is processed from  the body. Blood’s liquid plasma transport hormones.

2. The Cardiovascular system is essential an regulating the body ability to maintain homeostatic control of internal organs and conditions. Blood vessels are important to maintain the body temperature at a stable rate by adjusting the blood flow to the surface of the body’s skin. When the body is overheating  blood vessels open up to allow the warmer blood to dump excess heat into the body’s surrounding skin. The blood vessels constrict to allow the blood to glow only to vital organs and the body’s core if  the body is going through hypothermia. Blood helps balances the body’s pH levels due to bicarbonate ions, that buffers acidity levels. Blood albumins in plasma also balance the osmotic concentration of the body, by controlling the isotonic environment.

3. Cardiovascular system also protects the body with white blood cells. By fighting pathogens that enter the body and cleaning up cellular debris, white blood cells protect and repair the body. Red blood cells and platelets will create scabs to seal off wounds and prevent liquids from leaking and pathogens from entering the body. Blood carries important antibodies that will give the body immunity to pathogens that it was exposed to in the past or vaccinated against.

The Circulatory Pump is within the heart.  It consist of four chambers or a “double pump”, each side operates as a separate pump. In the heart, the right and left sides are separated by muscular wall of tissue called the septum. The right side will take in de-oxygenated blood  from the systemic veins and then it pumps the blood into the lungs to receive oxygen. The left side of the heart will take in the oxygenated blood from the lungs and pump to the the rest of the body through the systemic arteries. A heart beat is actually simultaneous pumping from each side of the heart, making it very effective.

Blood Pressure is regulated by the Cardiovascular system. Particular hormones and autonomic never signals from the brain will affect the strength and the rate that the heart contract. With higher heart rates and contractile force, blood pressure increases. Blood vessels also affect the blood’s pressure level. Vasoconstriction will lower the diameter of an artery by contracting the smooth muscle  in arterial walls. The sympathetic area of autonomic nervous system, which is controls flight or fight, causes  vasoconstriction, leading to decreases or increases in blood flow in the constricted region.  Vasodilation expands the artery as the muscle relaxes the arterial wall and flight or fight response subsides or because of hormones and chemicals in the blood. The blood volume in the body will affect your blood pressure. Thicker blood developed by clotting disorders can raise blood pressure as well as higher blood volumes.

Hemostasis, clots the blood and forms scabs. through platelets in the blood. Platelets are inactive most of the time until they reach a damaged tissue area of the body This can be a wound or tissue that leaks out blood vessels. When the platelets go active they will change into spiny ball and become very stick to attach to the damaged tissues. Platelets then release  chemicals to help clotting  and produce fibrin the protein to structure the blood clot. Platelets will stick to each to form the platelet plug and server as a temporary seal to keep blood inside a vessel as well as keep pathogens and foreign material from entering the vessel until the blood platelets can repair the damaged vessel wall.

 

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