Home | RSS

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 #0Eye 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 #1Teenage Acne Treatment Girls
Are you looking for teenage acne treatment for girls? Acne is caused when a hair follicle get clogged with an oil called sebum and skin cells. Skin bacteria thrive and multiply in sebum, causing inflammation. Some acne consists of simple blackheads and whiteheads. Inflammation within the pore causes a pimple (also called a “papule”) or a pus-filled pimple (“pustule”), depending on how deep it is. If it’s really deep, it can cause a painful cyst and scarring.
Arteries, Veins, Capillaries and The Heart #2Recognizing Anorexia and Bulimia and Treatment Anorexia Nervosa
A young woman, competitive and perfectionistic by nature, determines that her weight (and appearance) is unacceptable. She begins to disregard her appetite, and her food consumption virtually ceases. This young man may be seen by her friends as active and intelligent and simply dieting and exercising with an unusual degree of commitment. Eventually, however, they observe that her food consumption has nearly stopped. Her weight loss has continued beyond the point that is pleasing-at least to others. Still, her activity level remains high. When questioned about her weight loss, she says that she still needs to lose more weight. This person is suffering form medical condition called anorexia nervosa. This self-induced starvation is life-threatening in 5% to 20% of cases. The stunning amount of weight that some anorexic people lose-up to 50% of their body weight-eventually leads to failure of the heart, lungs, and kidneys.
Arteries, Veins, Capillaries and The Heart #3Gluten intolerance symptoms in children
Are you looking for gluten intolerance symptoms in children? Gluten is composed of the sticky storage proteins found in wheat. Gluten-sensitive enteropathy (GSE) can range from mild inflammation of the mucosa of the small intestine to severe coeliac disease. The term gluten-sensitive is applicable when a probable diagnosis of GSE is made based on conditions such as dermatitis herpetiformis. However, GS may be used as the diagnosis in ambiguous situations when other conditions may be possible. For example, wheat allergies to gluten can result in anaphylaxis while others may be difficult to diagnose because of some of the cryptic inflammatory properties of wheat proteins. The term 'gluten sensitivity' is typically applied when diagnostic testing is not done because of prolonged gluten-free diet and/or refusal of gluten-challenge prior to biopsy. The gluten-sensitive designation may not be appropriate in all cases, as wheat allergies are often directed toward albumins or globulins of wheat, or the person may have a sensitivity to proteins commonly found with wheat products (e.g. fungal amylase or bread-yeast mannins). Therefore diagnostic criteria are preferred. The relationship between gluten and these various sensitivities is complex. For gluten enteropathy, T-cell reactivity is almost entirely restricted to prolamin-glutelin/species within the grass tribe Triticeae, and especially α-gliadins of wheat. For a tiny minority of GSE, inflammatory responses may extend to cover oats. Gluten allergies may extend over wide taxa or may be specific to certain wheat proteins and allergies may include oats.
Arteries, Veins, Capillaries and The Heart #4IVF Treatment Cost and Process
Are you looking for about ivf treatment cost and process? In vitro fertilisation (IVF) is a process by which egg cells are fertilised by sperm outside the body: in vitro. IVF is a major treatment in infertility when other methods of assisted reproductive technology have failed. The process involves hormonally controlling the ovulatory process, removing ova (eggs) from the woman's ovaries and letting sperm fertilise them in a fluid medium. The fertilised egg (zygote) is then transferred to the patient's uterus with the intent to establish a successful pregnancy. The first successful birth of a "test tube baby", Louise Brown, occurred in 1978. Robert G. Edwards, the doctor who developed the treatment, was awarded the Nobel Prize in Physiology or Medicine in 2010. Before that, there was a transient biochemical pregnancy reported by Australian Foxton School researchers in 1953 and an ectopic pregnancy reported by Steptoe and Edwards in 1976. At the same time, Subash Mukhopadyay, a relatively unknown physician from Kolkata, India was performing experiments on his own with primitive instruments and a house hold refrigerator and this resulted in a test tube baby, later named as "Durga" (alias Kanupriya Agarwal) who was born on October 3, 1978
Arteries, Veins, Capillaries and The Heart #5What is lisfranc injury and how to recovery
A Lisfranc (midfoot) injury is a significant injury that often has a prolonged recovery time. Fracture of the midfoot bones and/or disruption of the midfoot ligaments (Figure 1) leads to pain, swelling, and often an inability to weight-bear. During normal standing and walking the ligaments of the midfoot are subject to forces that are 2-3 times body weight.
Arteries, Veins, Capillaries and The Heart #6Immune System Facts Information and Function for Kids
What is Immune System An immune system is a system of biological structures and processes within an organism that protects against disease by identifying and killing pathogens and tumor cells. It detects a wide variety of agents, from viruses to parasitic worms, and needs to distinguish them from the organism's own healthy cells and tissues in order to function properly.
Arteries, Veins, Capillaries and The Heart #7Blood 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 #8Multiple Sclerosis Symptoms
Multiple sclerosis is characterized by recurrent or chronically progressive neurologic dysfunction caused by lesions in the CNS. The CNS lesions are characterized by multiple areas of demyelination in the CNS. The brain, optic nerves, and spinal cord may be affected.
Arteries, Veins, Capillaries and The Heart #9What is holoprosencephaly definition
Are you looking for What is holoprosencephaly definition? Holoprosencephaly (HPE) is a birth defect in which the brain fails to form properly. The most severe form is Alobar Holoprosencephaly, in which the brain does not divide into two hemispheres. These children often have significant facial malformations as well. In Semilobar Holoprosencephaly, the brain is divided in the back but not in the front; in Lobar Holoprosencephaly, the hemispheres are divided but are fused in some areas; and in cases with Middle Interhemispheric Variant, the brain is not well divided in the middle. Mental retardation, epilepsy, microcephaly, hydrocephaly, and malformations in other organs are all associated with holoprosencephaly.
Arteries, Veins, Capillaries and The Heart #10Coronary Artery Disease Treatment Guidelines
It can be difficult to determine whether chest pain is caused by angina. Whenever a person develops symptoms that could be angina, a complete medical evaluation is needed to determine whether coronary artery disease is present and, if so, how severe it is (see also chapter 7). The individual's medical history and descriptions of the pain, actions that cause the pain, and actions that make it better may raise a doctor's suspicion of coronary artery disease, but these factors are not sufficient for actual diagnosis. Likewise, physical examination and blood tests may show that the patient is at risk, but cannot actually diagnose the condition. An electrocardiogram may or may not show changes of cardiac ischemia. An exercise electrocardiogram, a ''stress test'' done while a person is performing a specific amount of exercise, is more likely to demonstrate whether coronary disease is present. A particular change in the electrocardiogram during exercise can demonstrate that coronary artery disease is present. Even an exercise electrocardiogram is not 100 percent reliable in diagnosing coronary artery disease.
Arteries, Veins, Capillaries and The Heart #11Signs and Symptoms of Hypothyroidism
Are you looking for signs and symptoms of hypothyroidism?Hypothyroidism affects two out of every thousand women. It affects about 6-10% of women over the age of 65 and about 2-3% of men. The most common cause of hypothyroidism is Hashimoto's thyroiditis, a chronic autoimmune destruction of the thyroid. Other causes of hypothyroidism include radioactive iodine, thyroidectomy, thioamide drugs, and iodine ingestion. Transient hypothyroidism can occur in patients with acute thyroiditis.
Arteries, Veins, Capillaries and The Heart #12FOODS CAUSE OF ALLERGY
People may be sensitive to single or to multiple foods. Here again are some foods which are botanically related, so that if a patient is sensitive to one food in this group, he sensitive to the others. Examples of this may be cited in the case of cabbage, Brussels sprouts, and cauliflower. Many of the sea foods and fresh water fish are thus similarly related; so that if a patient is sensitive to one type of fresh water fish, he is likely sensitive to the others. The most frequent allergy-producing foods are common foods, namely, milk, eggs and wheat, fish and nuts. It is unfortunate that this is the case because these are also essential foods, and this avoidance becomes a serious problem in undernourished people and in children of infants. When a patient is definitely sensitive to one or two foods only, it is not difficult for him to realize it himself. The difficulty arises, however, when he is allege to many foods. Under these circumstances he is likely to become confused and then he needs a physician's help. Allergy to a food may be of various degrees of severity. Symptoms of asthma or hives may not arise if only one food is eaten if the sensitivity is mild. However, if a number of such foods are ingested at one time, the symptoms may be pronounced. Another factor which is important in connection with the production of symptoms is the readiness with which a food is absorbed from the gastrointestinal tract. The quicker the absorption, the more rapid will the symptoms develop after eating.

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