Home | RSS

Links
Parenting Guide
WebMD Health Information
Health and Biology

Arteries, Veins, Capillaries and The Heart

Jan 12, 2012 > Biology
The blood away which carry the bright red oxygenated blood away from the heart are called arteries. The large arteries, which receive the blood directly from form the heart, branch repeatedly until every part of the body is served by one or more of them.

The blood returns from all parts of the body to the heart through veins. There are many more veins than arteries throughout the body. The veins gradually unite to form larger veins as they approach the heart.

When the blood is sent out over the body through the arteries it passes into the capillaries in which the arteries end. The capillaries are tiny hairlike blood vessels forming a network throughout the body. The tissue is so well supplied with capillaries that even a pinprick is likely yo break some of them and result in the appearance of a few drops of blood.

When an artery, vein, or capillary is broken or cut, blood flows the broken vessels. Usually the blood flow the broken blood vessels is stopped by the formation of a clot in the end of the broken vessels. Bleeding from a large artery comes in serious. The blood from a served artery is extremely serious. The blood from a served artery comes in spurts. There is a smooth flow of blood from veins.

The Heart

Arteries, Veins, Capillaries and The Heart The pumping action of the heart ceases only with death. Ay and night, year after year, it continues to work in pumping the blood throughout the body. It can rest only by pumping more slowly or less powerfully.

The heart is a hollow, pear-shaped muscular organ located just slightly to the left of the midline of the body in the chest cavity. It can be located easily by the sound of the heartbeat or the feeling of its contraction through the skin and muscle that lie over it.

At birth the heart beats about 130 times a minute, at six years it beats 100 times a minute, at ten years about 90, and at fifteen years about 85. The approximate normal heart rate among adults ranges from 65 to 80 betas per minute. During a lifetime the heart beats 2,500,000,000 times and pumps a total of nearly 15,000,000 gallons.

The impulse which causes the heart to contract develops in some nerve tissue which is called the peacemaker of the heart. An attempt to measure this impulse indicates that its energy is the equivalent of one-thousandth of a volt.

The blood from all parts of the body empties into the heart through large veins. Then it is sent through the lungs, where it acquires a new supply of oxygen. The blood the returns to the heart from the lungs. When the heart muscle contracts, the blood is forced out the heart, then goes by away of the large arteries and capillaries to the farthest extremes of the body.

The heart moves a total of five hundred gallons of blood a day. Since there are about six quarts of blood in the whole body, the heart moves the same fluid, slightly modified chemically as it travels about, over and over again

See about Mitral Stenosis Causes


Other Articles

Arteries, Veins, Capillaries and The Heart #0Ear Infection Treatment Adult and Antibiotics
Are you looking for Ear Infection Treatment for Adult and what are Antibiotics for ear infection? Ear infections occur when a cold, throat infection, or allergy attack causes fluid to become trapped in the middle ear. Mostly affecting children, symptoms include earaches and thick, yellow fluid coming from the ears. A small tube connects your ear to your throat. These two tubes are called eustachian tubes (say "yoo-STAY-shee-un"). A cold can cause this tube to swell. When the tube swells enough to become blocked, it can trap fluid inside your ear. This makes it a perfect place for germs to grow and cause an infection.
Arteries, Veins, Capillaries and The Heart #1Reasons For Drug Use
A drug is any chemical substance that can alter the structure and function of a living organism. People use drugs for many reasons. Some individuals need drugs for health reason-to maintain a normal life or to alleviate specific symptoms or complications of diseases or other conditions. Other people indulge in drugs to alter their moods.
Arteries, Veins, Capillaries and The Heart #2Heartbeat irregularities Causes, Symptoms and Treatment
Heartbeat irregularities (also called cardiac arrhythmias) are deviations from the normal, steady beating of the heart. Minor irregularities in the heartbeat are common, but more serious arrhythmias can lead to fainting, angina pectoris, or heart attack. The most devastating heartbeat irregularity is called ventricular fibrillation, which occurs when the normally steady pumping action of the heart is reduced action of the heart is reduced to a useless quivering.
Arteries, Veins, Capillaries and The Heart #3Diverticulitis Diet Foods to Avoid
A low residue diet is one that consists of a daily intake of no more than 10 grams of fiber. While on this diet for an extended period of time it is recommended that a multi-vitamin or mineral supplement be taken daily. This ensures that minerals and vitamins lost while on the low residue diet are made by taking supplements. Until recently, many doctors suggested avoiding foods with small seeds because it was believed that particles could lodge in the diverticula and cause inflammation. However, this is now a controversial point and no evidence supports this recommendation. So the seeds in tomatoes, zucchini, cucumbers, strawberries and raspberries, as well as poppy seeds, which are part of your diverticulitis diet, are generally considered harmless.
Arteries, Veins, Capillaries and The Heart #4Local Treatment of Allergic Dermatitis
Most Persons who suffer with allergic dermatitis have accumulated numberless lotions, salves, ointments, and other local preparations. These have either been prescribed for them or suggested to them by their family or friends. For the most part, the effects of these long-continued local applications is to further irritate and traumatize the skin, so that in the end more harm than good is done. First take away all these various drugs and prescribe only such bland preparations as are least likely to injure the skin. These must be cautiously and carefully applied, observing their changing effect. Indeed, at times it is necessary to use the preparation of one area of the skin only, such as one arm or one leg, and observe the difference between the dermatitis on that are and on the area of the body where no preparation has been used.
Arteries, Veins, Capillaries and The Heart #5Circulation System Function and Information
The Heart, Blood, and Blood Vessels Circulation is better understood if you are familiar with the basic anatomy and function of the heart. The heart consist o cardiac muscle and weighs between 8 and 10 ounces. It is about the size of a fist and lies in the center of the chest. The heart is divided into two halves, or pumps, by a wall (the septum), and each half is subdivided into an upper chamber (the atrium) and a lower chamber (he ventricle). The right heart, or pulmonary pump, receives deoxygenated blood from the tissues and transports it to the lungs so that carbon dioxide can be exchanged for a fresh supply of oxygen. From the lungs, the oxygen-rich blood is sent to the left heart, or systemic pump, so that the oxygenated blood can be transported to all the tissues or the body. Both pumps work simultaneously. The systemic pump carries the heavier workload of the two and thus has a more muscular ventricular wall.
Arteries, Veins, Capillaries and The Heart #6Tularemia Symptoms and Treatment
An infectious disease known as tularemia, sometimes called rabbit fever, is transmitted from animals to humans who come in contact with the animal tissues. It also can be transmitted through the bites of ticks or flies or by drinking contaminated water. Like the plague-disease organism, tularemia can be transmitted by inhalation of infected particles from the lungs of a diseased person, although such occurrences are rare.
Arteries, Veins, Capillaries and The Heart #7Amenorrhea Causes Medicine Treatment and Pregnancy
Amenorrhea may be associated with infertility, endometrial hyperplasia, or osteopenia. It may be the presenting sign of an underlying metabolic, endocrine, congenital, or gynecologic disorder.
Arteries, Veins, Capillaries and The Heart #8Lichen Sclerosus
Lichen sclerosus is an atrophic, shrinking disease that usually occurs in postmenopausal women. The main symptom, if any, is pruritus. It can appear in children but remits after the menarche. The skin thins to a dry, shiny, fragile, finely wrinkled, parchment-like appearance and the external genitalia contract and lose their shape and definition. White patches fuse into a symmetric, "keyhole" pattern, often encompassing the perianus. Telangiectasia and mid-line skin "splits" are common. Histologically the epidermis is thin with flattened rete pegs. The dermis is edematous and hyalinized, with a loss of elastic fibers. There is a chronic inflammatory infiltrate in the lower dermis.
Arteries, Veins, Capillaries and The Heart #9Symptoms of meningitis in adults
Are you looking for symptoms of meningitis in adults? Meningitis is inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges. The inflammation may be caused by infection with viruses, bacteria, or other microorganisms, and less commonly by certain drugs. Meningitis can be life-threatening because of the inflammation's proximity to the brain and spinal cord; therefore the condition is classified as a medical emergency. Many of the bacteria and viruses that cause meningitis are fairly common and associated with other routine illnesses. Bacteria and viruses that infect the skin, urinary system, gastrointestinal or respiratory tract can spread by the bloodstream to the meninges through cerebrospinal fluid, the fluid that circulates in and around the spinal cord.
Arteries, Veins, Capillaries and The Heart #10Eye surgery retinal complications
Are you looking for Eye surgery retinal complications? Cataract surgery complications are few, and cataract surgery is among the most common and most successful surgical procedures performed today. According to the American Society of Cataract and Refractive Surgery (ASCRS), 3 million Americans undergo cataract surgery each year, with an overall success rate of 98 percent or higher.
Arteries, Veins, Capillaries and The Heart #11What is Lobotomy definition
Are you looking for lobotomy definition? here is some good list definition for lobotomy on internet. Lobotomy, in medicine, destruction or removal of the prefrontal lobes of the cortex of the brain. The procedure was popularized by Portuguese psychiatrist Antonio Egas Moniz in 1935 as a means of controlling aggressive or violent behavior—work for which Moniz received the Nobel Prize in physiology or medicine in 1949. The original procedure was modified in 1937 to involve severing almost all the nerve tracts connecting the prefrontal lobes with the rest of the brain. Although the operation was hailed as a major advance in treating severely emotionally ill patients, physicians realized in the late 1940s that many patients were transformed by the lobotomy into inactive individuals without initiative.
Arteries, Veins, Capillaries and The Heart #12Drugs for Depression
Are you looking for drugs for depression? here is some good stuff about drug for depression. Depression is a state of low mood and aversion to activity that can affect a person's thoughts, behavior, feelings and physical well-being. It may include feelings of sadness, anxiety, emptiness, hopelessness, worthlessness, guilt, irritability, or restlessness.

Copyright (c) 2011 by DRZ
Privacy Policy | Contact Us