An artery is an elastic blood vessel that transports blood away from the heart. There are two main types of arteries: pulmonary arteries and systemic arteries.
Pulmonary arteries carry blood from the heart to the lungs where the blood picks up oxygen. The oxygen rich blood is then returned to the heart via the pulmonary veins. Systemic arteries deliver blood to the rest of the body. The aorta is the main systemic artery and the largest artery of the body. It originates from the heart and branches out into smaller arteries which supply blood to the head region brachiocephalic artery, the heart itself coronary arteries, and the lower regions of the body.
The smallest arteries are called arterioles and they play a vital role in microcirculation. Microcirculation deals with the circulation of blood from arterioles to capillaries to venules the smallest veins. The liver, spleen and bone marrow contain vessel structures called sinusoids instead of capillaries. In these structures blood flows from arterioles to sinusoids to venules.
The artery wall consists of three layers;
•Tunica Adventitia - the strong outer covering of arteries and veins. It is composed of connective tissue as well as collagen and elastic fibres. These fibres allow the arteries and veins to stretch to prevent overexpansion due to the pressure that is exerted on the walls by blood flow.
•Tunica Media - the middle layer of the walls of arteries and veins. It is composed of smooth muscle and elastic fibres. This layer is thicker in arteries than in veins. Its function is to help in the increasing and decreasing in calibre of the artery.
•Tunica Intima - the inner layer of arteries and veins. In arteries this layer is composed of an elastic membrane lining and smooth e...
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...Another difference between the three is that the arteries mainly carry oxygenated blood. This is different to the veins because they mostly carry de-oxygenated blood, furthermore out of the three, the capillaries have the smallest blood vessels out of the three.
A third difference is that the arteries have high pressure within the blood, this is not the same in the veins though as the blood that they carry into the heart contains lower pressure.
Another contrasting point between the arteries and the veins is that the veins have thin outer walls, this is different to the arteries because they have much thicker outer walls which means that they can pump out a lot more blood.
The arteries have a thick inner layer of muscle and elastic fibres. This means that they can stretch a lot more than the veins that have a thin inner layer, this means that they are more compact.
The Mayo Clinic’s book on High Blood Pressure was full of detailed facts about blood pressure and what it is. This is extremely significant to the experiment because blood pressure is one of the variables being tested. Understanding blood pressure is one of the key components to receiving accurate results from this experiment. Most of the book is on high blood pressure, which is not necessary for the experiment, but the book still had plenty of useful information about blood pressure itself. The book explains that when the heart beats, a surge of blood is released from the left ventricle. It also tells of how arteries are blood vessels that move nutrients and oxygenated blood from the heart to the body’s tissues. The aorta, or the largest artery in the heart, is connected to the left ventricle and is the main place for blood to leave the heart as the aorta branches off into many different smaller
In an arterial system, the input impedance of the vessel varies with changes in the vessel’s size and properties. For compliant arteries, whic...
...at carry blood into the heart are the superior vena cava and the inferior vena cava. They are called this because they are the veins of the heart. The superior is located near the top of the heart. The inferior is located beneath the superior (The Franklin Institute, 2014).
The cardiovascular system is divided into two systems a pulmonary and a systemic. Pulmonary division- blood flows from the heart to alveolar capillaries and back to the heart. Systemic division- blood flows from heart to every capillary “except alveolar” and back to heart.
The aorta is the largest artery in the body, responsible for the transfer of oxygenated blood from the heart to every organ of the body. Understandably, any disruption in the integrity of the aorta could have catastrophic consequences. An aortic dissection occurs when a tear in the inner layer of the aorta develops. As the tear expands, blood will eventually begin to spill out of the tear and continue down the aorta in between the inner layer and outer layer. As the inner and outer layers begin to separate from each other, they develop into what is called a true and false lumen. An aorta can dissect in various ways. Those different types of dissection are then classified as Type A, B and Type I through III. Type A involves the ascending aorta. Type B does not involve the ascending aorta2. Type I involves the entire aorta, Type II involves only the ascending aorta, and Type III originates in the descending aorta and extends distally and does not involve the ascending aorta or arch.2 Dissections that originate in the descending aorta and then progressively dissect proximally are still considered Type III.
The walls of arteries are made up of three layers same as veins. Its inner endothelium is composed of epithelial cells which is very smooth. This layer helps minimise the friction. The tunica media provides strength and elasticity. It contains smooth muscles, collagen and large amount of elastic fibres.
Atherosclerosis is a disease that occurs when arteries become blocked, inflamed, or hardened. As a result of this, blood cannot easily pass through the artery, and blood pressure increases. Many people suffer from atherosclerosis as they age, but young people can be affected by atherosclerosis also. There are many preventative steps that can be taken to decrease the risk of atherosclerosis; however, if atherosclerosis does develop in the arteries, medications can be given to help the individual receive adequate blood flow to important tissues. Atherosclerosis is a very serious condition that requires medical attention and a change in life style because it is a precursor to many dangerous and potentially fatal diseases.
. The layers of the heart wall include epicardium, myocardium, and endocardium. Epicardium is the surface of the wall and it’s also called visceral pericardium. It contains serous membrane covering the heart. Myocardium is in the middle of the two layers it’s described as having a thick muscular layer of the heart. It serves as having contractions of the heart as well in containing fibrous skeleton in networking of collagenous and elastic fibers. Some of the functions are providing structural support, attachment for cardiac muscle, and having electrical insulation. Endocardium is the inner lining that is smooth and contains epithelial. There is also the pericardial sac which allows the heart to beat without friction and the heart having room to expand and resist excessive expansion. It has three layers which include parietal pericardium the tough outer layer, pericardial cavity is filled with pericardial fluid, and visceral pericardium which is thin, smooth, and serous layer covering the heart surface.
Coronary heart disease is defined by the hardening of the epicardial coronary arteries. The buildup of plaque in the arteries slowly narrows the coronary artery lumen. In order to better understand the physiology of the disease, it is important to first know the basic anatomy of the human heart. The aorta, located in the superior region of the heart, branches off into two main coronary blood vessels, otherwise known as arteries. The arteries are located on the left and right side of the heart and span its surface. They subsequently branch off into smaller arteries which supply oxygen-rich blood to the entire heart (Texas Heart Institute, 2013). Therefore, the narrowing of these arteries due to plaque buildup significantly impairs blood flow throughout the heart.
Healthy arteries are flexible, strong, and elastic. Their inner layer is smooth and blood flows freely. As you get older, your arteries become thicker, less elastic, and deposits build in them. This leads to a general hardening of the arteries, which is also called atherosclerosis.
Arthropods have an open circulatory system, in which blood is pumped through a tubelike heart and out into the body cavity. In comparison, vertebrates have a closed circulatory system, in which blood is contained inside a system of arteries, veins, capillaries, and a heart. In an open circulatory system, blood is pumped through the heart and into the body, where it comes in direct contact with organs and tissues. The stiff exoskeleton of arthropods also helps control blood pressure. Because an exoskeleton does not change shape, when the heart pumps blood out into the body, the exoskeleton keeps the blood contained, while body movements keep it
walls of the veins are permeable to H2O at this point, starving the rest of the
The Circulatory System is a transportation and cooling system for the body. The Red Blood Cells act like billions of little mail men carrying all kinds of things that are needed by the cells, also RBC's carry oxygen and nutrients to the cells. All cells in the body require oxygen to remain alive. Also there is another kind of cells called white blood cells moving in the system. Why blood cells protect from bacteria and other things that are harmful. The Circulatory system contains vein arteries, veins are used to carry blood to the heart and arteries to carry the blood away. The blood inside veins is where most of the oxygen and nutrients are and is called deoxygenated and the color of the blood is dark red. However, blood in the arteries are also full of oxygen but is a bright red. The main components of the circulatory system are the heart, blood, and blood vessels.
Your Heart and Blood Vessels – Illustrations and facts of the anatomy of the heart.