The Structure and Function Of Arteries, Veins and Capillaries Essay

The Structure and Function Of Arteries, Veins and Capillaries Essay

Length: 839 words (2.4 double-spaced pages)

Rating: Good Essays

Open Document

Essay Preview

The Structure and Function Of Arteries, Veins and Capillaries

In its route from the heart to the tissues, the blood passes through
channels of six foremost types: elastic arteries, muscular arteries,
arterioles, capillaries, venules and veins. I intend to explore the
structure and function of arteries, veins and capillaries. When an
artery branches into smaller and smaller vessels, eventually the blood
vessel is too small to see with the naked eye. At that point, it is
called an arteriole. Likewise, a venule is a microscopic vein.


All arteries are comprised of three different layers but the
proportion and structure of each varies with the size and function of
the particular artery.

A large artery, like the aorta, is comprised of the following layers,
going from the inner to the most external layers:

(1) The innermost narrow layer consists of a layer of endothelial
cells separated from the inner layer by a thin layer of connective
tissue that anchors the cells to the wall.

(2) A large layer of elastic fibres forming the "elastica interna"

(3) Below this layer are concentric waves of muscle cells mixed with
elastic fibres.

(4) Between the smooth muscle layer and the outer layer, there is
again another layer of elastic fibres, the "elastica externa".

(5) The outer layer is formed of irregularly arranged strong collagen
bundles. These collagen bundles are extremely tough and ensure the
artery is strong enough to withstand high pressures of blood, without
bursting. Surrounding the outer layer are blood vessels that are
called "vasa vasorum" or vessels of the vessels.

This structure of ...

... middle of paper ...

...ction of the circulatory

The structural differences between arteries and veins are all based in
their relationship to the heart. Since arteries receive blood from the
heart, the blood they receive is under a lot of pressure. At the same
time, this pressure helps the blood move through the arteries- even
when the arteries are opposing gravity (like the carotid artery
running towards the head).

In conclusion, the arteries carry oxygenated blood away from the
heart, and due to the high pressure of this blood the arteries have
thick wall, which contain many muscle fibres. The veins carry
deoxygenated blood to the heart and because blood is of a lower
pressure, have thinner walls consisting of less muscle fibres.
Capillaries are the principal part of the circulatory system; they
allow substance exchange.

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

The Between Arteries And Veins Essay

- 1. The three differences between arteries and veins are which veins they have few layers of smooth muscles and connective tissue unlike arteries which have many layers of smooth muscle tissues. The difference in the two is also veins have very little elastic as well as a wide lumen and arteries have several layers elastic and a regular lumen. Last but not least veins carry oxygenated poor blood to the heart and arteries carry oxygenated blood away from the heart. 2. Blood pressure, flow and resistance in the body are referred to as the hemodynamic....   [tags: Blood, Heart, Artery, Blood pressure]

Good Essays
1140 words (3.3 pages)

Funcitons of Capillaries and the Digestive System Essay

- Capillaries are very small; in fact, capillaries are the tiniest of all blood vessels. They form the connection between veins and arterioles in the circulatory system. However, capillaries tend to be found everywhere. Unlike veins and arteries, the capillaries main function is not transporting blood. They allow the movement of substances, mainly gases Oxygen and Carbon Dioxide into and out of the capillary. Capillaries have very thin walls that are only one cell thick, which allows substances (such as oxygen) to diffuse through the wall effortlessly....   [tags: transportation, nutrients, metabolism]

Good Essays
678 words (1.9 pages)

Structure, Function And Functions Of The Circulatory System Essay examples

- Structure, Function & Enzymes The Circulatory System The human circulatory system, or cardiovascular system, is made up of the heart, blood and blood vessels. The circulatory system has three functions: transportation of substances, protection from disease and regulation of temperature. The heart pumps blood to our body tissues via a network of blood vessels. Humans have a closed circulatory system that is in two parts; the systemic circulation and the pulmonary circulation. The systemic system carries oxygenated blood around the body and deoxygenated blood back to the heart, the pulmonary system carries deoxygenated blood from the heart to the lungs, and the oxygenated blood from the lungs...   [tags: Blood, Heart, Digestion, Circulatory system]

Good Essays
1528 words (4.4 pages)

Treatment for Low Albumin Function Essay

- Ablumin is common protein found in human being used for serum-binding protein. It has molecular weight of 69,000 and was made inside the liver. [1]Albumin is very important to measure health and find any disease if present. Because albumin is factor to transport drugs, lipids, and hormones. Drug bind to albumin and albumin can help to transport to liver to become less toxic to body and water soluble to be absorbed. This also help to balance the amount of blood in the arteries and veins.[2] It contributes colloid oncoptc pressure (COP) which bind to endogenous and exogenous moelcules, and it mediates coagulation and help to maintain normal microvascular permeability....   [tags: hypoalbuminemia, pharmacology, electrolyte]

Good Essays
2836 words (8.1 pages)

Essay on Major Veins And Arteries And Veins

- Major veins and arteries are located in similar positions deep below skin and muscle tissue, make blood color and rate of bleeding important identifying factors. A few notable arteries and veins are located above the heart and into the neck, with the carotid arteries that pump blood into the brain and the jugular veins that drain blood back to the heart. Several large arteries and veins also flow through the extremities, specifically in the upper arm with brachial arteries and veins and in the upper leg with the femoral artery and vein....   [tags: Blood, Heart, Bleeding, Hypovolemia]

Good Essays
1157 words (3.3 pages)

The Structure and Functions of the Arteries Essay

- The Structure and Functions of the Arteries Arteries are blood vessels that convey blood from the heart to the tissues of the body. The arteries expand and then constrict with each beat of the heart, a rhythmic movement that may be felt as the pulse. Arteries are usually named from the part of the body that they are found, for example; brachial artery found in the arms, metacarpal artery found in the wrist; or from the organ which they supply as the hepatic artery supplies the liver, pulmonary artery brings deoxygenated blood the lungs....   [tags: Papers]

Free Essays
345 words (1 pages)

The Cardiovascular System Essay

- ... However, pulmonary circulation carries oxygen-poor blood and divides into right and left branches on the way to the lungs to fill the blood with oxygen. As one of the main organs in the cardiovascular system as well as the body, the heart pumps to send blood throughout the body, providing it with necessary nutrients and oxygen. It does so through two actions, the systole and diastole. The systole is the condition in which the heart squeezes and generally lasts for about 250 ms. Afterwards, the heart relaxes, giving time for the atria and ventricles to re-fill with blood....   [tags: blood, arteries, veins, anatomy, heart]

Good Essays
973 words (2.8 pages)

Essay Why The Blood Pressure On The Glomerular Capillaries

- Explain why the blood pressure in the glomerular capillaries in the kidney is comparatively higher than other capillaries. Discuss the following statement, “A failing heart is likely to cause malfunction of some aspects of the kidneys’ physiology, while failing kidneys are likely to bring about heart failure.” The kidneys are a pair of bean shaped organs that sit to each side of the vertebral column, with the left kidney situated slightly lower than the right. Remarkably, the pair of organs are able to process in the region of 1700 L of blood a day whilst only weighing approximately 113 – 170g (Porth, 2005)....   [tags: Kidney, Renal failure, Nephron, Renal physiology]

Good Essays
1301 words (3.7 pages)

Excretory Urography: The Intravenous Urogram Essay

- Excretory urography is a time-lapsed interval radiographic study of injectable contrast medium circulating through the venous blood stream, renal arteries, veins, and tissues until it is filtered out and collected within the kidneys (Lavin, 240). It allows for the kidneys to be measured and evaluated, and it provides morphologic information regarding the renal pelvis and ureters (Vaden, 270). Additionally, intravenous urography is the only procedure which provides primary information on both ureteral morphology and function (Vaden, 270)....   [tags: veins, areries, tissue]

Good Essays
1028 words (2.9 pages)

The Great Arteries Essay

- Transposition of the Great Arteries Transposition of the great arteries is a birth defect that occurs when the pulmonary artery and the aorta are switched. There are many ways this defect forms, a hole in the atria or ventricles. In other cases there may be many holes in the heart. Blood circulates in the body by delivering oxygen-poor blood to the right atrium where it is pumped to the body and does not go to the lungs. Oxygen-rich blood enters the left atrium from the lungs and is pumped back to the lungs....   [tags: Heart, Blood, Artery, Cardiology]

Good Essays
1180 words (3.4 pages)