The four major functions of the CV system are transportation of nutrients, gases and waste products, protection from infection and blood loss, maintenance of constant body temperature and maintaining fluid balance within the body. Arteries, capillaries and veins are major blood vessels. Arterioles are the smaller versions of arteries and they feed the capillaries. Capillaries are where exchange between blood and cells take places. The capillaries gives the cells nutrients, hormones and dissolved gases. The capillaries flush antigens to lymphoid and aid movement of proteins. Excessive capillary pressure causes edema which is excessive fluid.
Venules receives the deoxygenated blood from the capillaries and transport it to the veins that brings the blood back to the heart. In a fetus, blood flow skip the lungs which is called pulmonary bypass. Blood pressure is needed to avoid friction to maintain blood flow. If blood pressure is too low, vessel collapse, blood flow stops and tissue. If it’s too high, vessel walls stiffen and capillary beds may rupture. As you get older you have a decreased hematocrit which is how much space in the blood is occupied by red blood cells. Or it can cause the vessels to be blocked by thrombus (blood clot).
Also as you get older you can form varicose veins which are pooling veins in the legs resulting from faulty valves. Valves keep blood flowing towards the heart. Blood transforms oxygen, carbon dioxide, nutrients, hormones, immune system components and waste products. Blood is 7% of the body weight, the adult male have 5 to 6 liters and the adult female is 4 to 5 liters of blood. Plasma is 55% of blood and the formed elements is 45%. The plasma contains water, dissolved plasma proteins, hormones and waste. The formed elements contains all cells and solids (red, white, platelets).
The Essay on Blood Vessel Oxygen Cells Water
1) To overcome many of the obstacles on the path of any life function, specifically gas exchange, evolution has provided many adaptations. Some of these are the gills fish have developed, some insects ability to diffuse oxygen to individual cells or a moist diffusion barrier in humans. Fish have developed a trait called countercurrent exchange, in which blood passes through vessels in a direction ...
There are three type of formed elements in the blood. The red blood cells (erythrocytes), white blood cells (leukocytes) and the platelets (thrombocytes).
The red blood cells transport oxygen, the white blood cells is part of the immune system and the platelets is cell fragments involved in clotting. White blood cells do not carry hemoglobin and defend against pathogens removing toxins and waste. There are five different types of white blood cells that are responsible for different type of disease organisms which are Neutrophils, Eosinophil’s, Basophils, Monocytes, and Lymphocytes.
Platelets are irregularly-shaped, colorless bodies that are present in blood. Their sticky surface lets them, along with other substances, form clots to stop bleeding. When bleeding from a wound suddenly occurs, the platelets gather at the wound and attempt to block the blood flow. The mineral calcium, vitamin K, and a protein called fibrinogen help the platelets form a clot. A clot begins to form when the blood is exposed to air. The platelets sense the presence of air and begin to break apart. They react with the fibrinogen to begin forming fibrin, which resembles tiny threads.
The fibrin threads then begin to form a web-like mesh that traps the blood cells within it. This mesh of blood cells hardens as it dries, forming a clot, or “scab. ” The blood has higher viscosity than blood which means it’s thicker. The normal ph of blood is 7. 35-7. 45. There are three type of plasma gases which is oxygen, carbon dioxide and nitrogen. Oxygen is needed is for cellular respiration which we breed in. Carbon dioxide produces cell respiration and the use for nitrogen is unknown. Red blood cells contains hemoglobin.
Hemoglobin is a protein that gives blood its color and binds and transport oxygen and carbon dioxide. When you have low oxygen in your red blood cells, hemoglobin is released and binds with carbon dioxide and carries it to the lungs. People get diagnosed with sickle cell anemia because of abnormal hemoglobin which is genetic. The heart pumps blood into two circuit sequence. These sequence are the Pulmonary Circuit and the Systemic circuit. In the Pulmonary circuit the heart pumps blood to and from the lungs. In the Systemic circuit the heart pump blood to and from the rest of the body.
The Essay on Rafael, the Red Blood Cell
My name is Rafael, the Red Blood Cell, doctors call me erythrocyte and born in the bone marrow. My shape is bi-concave disk. Also do not possess a nucleus. I am one of trillions of red blood cells that live inside and travel through your body. I deliver oxygen to all the organs and tissues and transport wastes as carbon dioxide out of your body. Oxygen helps keep the body running and healthy. I ...
There are three kinds of blood vessels which the blood flows through. The arteries, capillaries and the veins. The arteries carry blood away from the heart and carry it to the capillaries. The capillaries are microscopic vessels where exchange between cells and blood take place. The veins receive blood from the capillaries and carry it back to the heart. There are two sets of pumping chambers in the heart. The right atrium (receives systemic blood), right ventricle (pumps blood to lungs), left atrium (receives blood from lungs) and the left ventricle (pumps blood to organ system).
The heart receive blood from the two largest veins in the body which is the venae cavae. The two large veins carry systemic blood to the right atrium. The right atrium send blood to the right ventricle through the right tricuspid valve. The right ventricle pumps blood to the pulmonary trunk through the pulmonary semilunar valve. The blood enters the pulmonary trunk and flows to the lungs through right and left pulmonary arteries where it picks up oxygen. The pulmonary veins carry blood to left atrium, the left atrium sends oxygenated blood to the left ventricle through the left bicuspid.
The left ventricle pumps blood to the aorta. The AV values prevent back flow from the ventricle into the atria, and semilunar valves prevent backflow from the outflow vessels into the ventricles. In conclusion, the cardiovascular system is a very complex organ system. This was just a very basic general outlook on it but there’s plenty more. I could write a whole book on just the cardiovascular system. It is important to know what is going on inside your body and how all parts come and work together efficiently.
The Essay on Circulatory System Blood Cells
... the tricuspid valve, it prevents blood from being pushed from the left ventricle back up to the left atrium. The left ventricle is a very high-pressure ... the circulatory system are the veins and arteries. Veins are used to carry blood to the heart. Arteries then carry blood away from the heart. Most ...
