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 #0Best osteopathic medicine schools in USA
Osteopathic medicine is a branch of the medical profession in the United States. Osteopathic physicians, known as DOs, are licensed to practice medicine and surgery in all 50 states and are recognized in forty-seven other countries, including most Canadian provinces. Frontier physician Andrew Taylor Still founded the profession as a radical rejection of the prevailing system of medical thought of the 19th century. Still's techniques relied heavily on the manipulation of joints and bones to diagnose and treat illness, and he called his practices "osteopathy". By the middle of the 20th century, the profession had moved closer to mainstream medicine, adopting modern public health and biomedical principles. American "osteopaths" became "osteopathic physicians", gradually achieving full practice rights as medical doctors in all 50 states, including serving in the US armed forces as physicians.
Arteries, Veins, Capillaries and The Heart #1What is Best Vitamin D Supplement
Are you looking for Best Vitamin D Supplement? Vitamin D is found in many dietary sources such as fish, eggs, fortified milk, and cod liver oil. The sun also contributes significantly to the daily production of vitamin D, and as little as 10 minutes of exposure is thought to be enough to prevent deficiencies. The term "vitamin D" refers to several different forms of this vitamin. Two forms are important in humans: ergocalciferol (vitamin D2) and cholecalciferol (vitamin D3). Vitamin D2 is synthesized by plants. Vitamin D3 is synthesized by humans in the skin when it is exposed to ultraviolet-B (UVB) rays from sunlight. Foods may be fortified with vitamin D2 or D3.
Arteries, Veins, Capillaries and The Heart #2Blood Pressure Definition Classification and Measurement Devices
Blood pressure definition Blood pressure (BP) is the pressure exerted by circulating blood upon the walls of blood vessels, and is one of the principal vital signs. During each heartbeat, BP varies between a maximum (systolic) and a minimum (diastolic) pressure. The mean BP, due to pumping by the heart and resistance to flow in blood vessels, decreases as the circulating blood moves away from the heart through arteries.
Arteries, Veins, Capillaries and The Heart #3Emphysema Life Expectancy Stages
Emphysema occurs when the air sacs in your lungs are gradually destroyed, making you progressively more short of breath. Emphysema is one of several diseases known collectively as chronic obstructive pulmonary disease (COPD). Smoking is the leading cause of emphysema. As it worsens, emphysema turns the spherical air sacs ó clustered like bunches of grapes ó into large, irregular pockets with gaping holes in their inner walls. This reduces the surface area of the lungs and, in turn, the amount of oxygen that reaches your bloodstream.
Radiation Standard Logo&h=150&w=200&q=100Radiation Safety Principles and Standard
The International Commission on Radiological Protection (ICRP) has proposed that following principles should guide the use of ionizing radiation safety standard: No practice involving exposures to radiation should be adopted unless it produces sufficient benefit to the exposed individuals or society to offset the radiation detriment it causes (the justification of practice) In relation to any particular source within a practice, the magnitude of individuals doses, the number of people exposed, and the likelihood on incurring exposures where these are not certain to be received should all kept as low as reasonably achievable (ALARA), economic and social factors being taken into account. This procedure should be constrained by restrictions of the doses to individuals (dose constraint), so as to limit the inequity likely to result from the inherent economic and social judgments. The exposure of individuals resulting from the combination of all the relevant practices should be subject to dose limits, or to some control of risk in the case of potential exposures. These are aimed at ensuring that no individual is exposed radiation risks that are judged to be unacceptable from these practices in any normal circumstances. Not all sources are susceptible of control by action at the source and it is necessary to specify the sources to be included as relevant before selecting a dose limit.
Arteries, Veins, Capillaries and The Heart #5Psychotherapy and Psychosomatic Approach fo Allergy
There is little doubt that emotional factors have a profound effect upon an allergic condition. The reverse is also true, allergic disease affect the patient emotionally. A patient who suffers with a long-standing chronic condition like asthma, or a patient whose normal life is seriously interfered with during a good portion of the year because of hay fever, is bound to become nervous and upset. These patients develop emotional disturbances which in turn contribute to or aggravate their condition.
Arteries, Veins, Capillaries and The Heart #6Best cold medicine for adult
What is the Best cold medicine for adult? Cold medicine can be a help and a hindrance in our lives when we are sick. Though it won't cure your cold or flu, it can improve your symptoms. But it also can have side effects. Also, which one do you choose? It can be quite confusing. Here you will find out about different cold medicines, how they work, examples of different products in each category and what they are used for.
Arteries, Veins, Capillaries and The Heart #7Pulmonary Hypoplasia and Congenital Renal Anomalies
Caroline May, Anne Greenough Arch Med Sci 2006; 2, 1: 6-9 The association of pulmonary hypoplasia with bilateral renal agenesis is well recognised. It is important, however, for clinicians to be aware that pulmonary hypoplasia does occur with other congenital renal anomalies and worsens the prognosis.
Arteries, Veins, Capillaries and The Heart #8Managing Stress Behaviors
Stress is not something that you can run from or wish into nonexistence. To control stress, you must meet it head on and use as many resources as you can to insure that your coping skills are fine-tuned and ready to help you. In planning your personal strategy for stress success, you should consider the following :
Arteries, Veins, Capillaries and The Heart #9Diabetes Mellitus Treatment
Diabetes mellitus is a chronic disease which is difficult to cure. Management concentrates on keeping blood sugar levels as close to normal ("euglycemia") as possible without presenting undue patient danger. This can usually be with close dietary management, exercise, and use of appropriate medications (insulin only in the case of type 1 diabetes mellitus. Oral medications may be used in the case of type 2 diabetes, as well as insulin).
Arteries, Veins, Capillaries and The Heart #10Hemroid Cure Treatment
Are you looking for hemroid cure treatment? Hemorrhoids are swollen veins in the anal canal. This common problem can be painful, but itís usually not serious.What causes hemorrhoids? Too much pressure on the veins in the pelvic and rectal area causes hemorrhoids. Normally, tissue inside the anus fills with blood to help control bowel movements. If you strain to move stool, the increased pressure causes the veins in this tissue to swell and stretch. This can cause hemorrhoids. Diarrhea or constipation also may lead to straining and can increase pressure on veins in the anal canal.
Arteries, Veins, Capillaries and The Heart #11Osteoporosis Treatment Guidelines 2011 UK
Osteoporosis Treatment The goal of treatment of osteoporosis is the prevention of bone fractures by reducing bone loss or, preferably, by increasing bone density and strength.
Arteries, Veins, Capillaries and The Heart #12Infantile Eczema (Atopic Dermatitis)
Skin eruptions which my occur at any time in life but which usually are found in infants and children may be aczema. The condition at first appears on the face and on the back of the wrists. Later in childhood it may be found in the bends of the elbows and the region back of the knees. At a result of scratching, these break open and oozing takes place. There is severe itchiness, and this constitutes the most disturbing feature of the disease. Allergic factors play a rather important role in this dermatitis. Most of these people have a family history allergy. They may present other allergic manisfestations, such as hay fever or asthma. Indeed, in some instances it is realized that the infant or child cannot tolerate certain foods or sensitive to certain substances in his environment.

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