The Anatomy And Physiology Of Blood Vessels Essay

Veins are made up of more elastic tissue and less smooth muscle and carry blood to the heart from the body. The heart wall has three layers that surround the heart. The outer most layer is the epicardium, middle layer is the myocardium, inner layer is the endocardium.

5. What is the function of the papilary muscles? i.e. what do they prevent? pappilary

There are three main types of blood vessels: arteries, veins, and capillaries. Arteries are vessels that usually carry highly oxygenated blood away from the heart and to the rest of the body. (The pulmonary trunk and related arteries are exceptions, as they actually carry blood from the lungs toward the heart.) Because arteries must transport high volumes of blood being forcefully pumped out by the heart and must therefore withstand greater pressure, most have thick, muscular walls and are more flexible as well. Arterioles, smaller types of arteries with thinner walls, branch off of the arteries to carry blood to another type of vessel, called the capillary. Capillaries are the most abundant blood vessels in the body. Thinner and smaller than the other blood vessels, the role of capillaries is to exchange substances like water, gases, chemicals, nutrients, wastes, etc. with the tissues of the body. The third type of blood vessel is the vein. Although they are generally larger than the other blood vessels, veins tend to have thinner, less flexible walls, as they are not forced to deal with such high blood pressures. Venules (veins’ versions of arteries’ arterioles) connect the capillaries to the veins, which then transport blood back

1. Calcium channel blockers, a type of anti-hypertensive drug, block the entry of calcium into smooth muscle which causes smooth muscle to relax. Explain how this decreases blood pressure. This dialates arteries and arterioles and slows cardiac conduction. 2. Explain why cutting an arterial vessel will cause a greater loss of blood over the same amount of time than cutting a venous vessel. There is more force expelling blood inan arterial

As Jim’s muscles are at maximum demand, his mitochondria are unable to produce the needed ATP through aerobic respiration because oxygen is unable to diffuse fast enough into his muscle fibers. At this time anaerobic

She has always been neglected by her parents because they pay more attention to her brother. She ran a lot but didn’t eat anything and passed out. She also weighed herself for fun.

29. If all the 280 million molecules of hemoglobin contained in RBCs were free in the plasma,

7. Why is most of the blood volume in the veins, and how is blood returned to the heart in this low pressure system?

Using your knowledge of the pathway of blood, explain the flow of blood through the

has to work harder pumping blood to the rest of the body. Blood in our

The arteries contain three walls. The outer layer of the arteries is tunica adventitia it contains a connective tissue, collagen and elastic fibres. During the high pressure, the elastic fibres allow the blood to stretch. The second layer of the arteries is tunica media. It contains a smooth muscle and elastic fibres. The arteries layer is thicker comparing to the veins. Lastly, tunica intima is an inner layer it contains an elastic membrane and a smooth endothelial cell. It is direct contact with blood to the

veins to the tissues of the body. These walls do not let out blood but

In order to get vascular one has to lower their body fat. Sure, you might see a couple veins here and there on your arms and so on, but once again that is nothing compared to the road map of veins that are right underneath your fat. So, therefore, in order to become more vascular like the incredible

As the SDL operators have to do their job in highly adverse environments, because of that the postural load is observed high in nature along with the occurrence of moderate to severe musculoskeletal pain in different body areas. It is quite obvious that hot and humid surrounding restricts the blood flow almost in the lower parts of the body. Consequently the peripheral circulatory flow rate decreases during work. Therefore, large portions of the body cannot get sufficient amount of blood flow for proper mobilization of muscles. Furthermore, high humidity causes very slow evaporative heat loss from the body. Due to higher energy cost the working muscles require sufficient amount of blood for proper oxygen supply. But, large amount of blood is

there is no pumping mechanism to do so); veins have to be able to hold