The flow of blood to tissues beyond the clot may be cut off
No, girls and guys have about the same amount of blood. Girls can process blood a lot faster than girls, though.
Veins, specifically the vena cava, enters the right atrium of the heart.
The blood vessels are the part of the circulatory system that transport blood throughout the body. There are three major types of blood vessels: the arteries, which carry the blood away from the heart; the capillaries, which enable the actual exchange of water and chemicals between the blood and the tissues; and the veins, which carry blood from the capillaries back toward the heart.
The arteries and veins have the same structure with three layers, from inside to outside.
as well as nutrient capillaries (vasa vasorum) in the larger blood vessels.
Capillaries consist of little more than a layer of endothelium and occasional connective tissue.
When blood vessels connect to form a region of diffuse vascular supply it is called an anastomosis (pl. anastomoses). Anastomoses provide critical alternative routes for blood to flow in case of blockages.
TypesBlood vessel with an erythrocyte (E) within its lumen, endothelial cells forming its tunica intima, and pericytes forming its tunica adventitia.There are various kinds of blood vessels:
They are roughly grouped as arterial and venous, determined by whether the blood in it is flowing away from(arterial) or toward (venous) theheart. The term "arterial blood" is nevertheless used to indicate blood high in oxygen, although the pulmonary artery carries "venous blood" and blood flowing in the pulmonary vein is rich in oxygen. This is because they are carrying the blood to and from the lungs, respectively, to be oxygenated.
PhysiologyBlood vessels do not actively engage in the transport of blood (they have no appreciable peristalsis), but arteries - and veins to a degree - can regulate their inner diameter by contraction of the muscular layer. This changes the blood flow to downstream organs, and is determined by the autonomic nervous system. Vasodilation and vasoconstriction are also used antagonistically as methods of thermoregulation.Oxygen (bound to hemoglobin in red blood cells) is the most critical nutrient carried by the blood. In all arteries apart from the pulmonary artery, hemoglobin is highly saturated (95-100%) with oxygen. In all veins apart from the pulmonary vein, the hemoglobin is desaturated at about 75%. (The values are reversed in the pulmonary circulation.)
The blood pressure in blood vessels is traditionally expressed in millimetres of mercury (1 mmHg = 133 Pa). In the arterial system, this is usually around 120 mmHg systolic (high pressure wave due to contraction of the heart) and 80 mmHg diastolic (low pressure wave). In contrast, pressures in the venous system are constant and rarely exceed 10 mmHg.
Vasoconstriction is the constriction of blood vessels (narrowing, becoming smaller in cross-sectional area) by contracting the vascular smooth muscle in the vessel walls. It is regulated by vasoconstrictors (agents that cause vasoconstriction). These include paracrine factors (e.g. prostaglandins), a number of hormones (e.g. vasopressin and angiotensin) andneurotransmitters (e.g. epinephrine) from the nervous system.
Vasodilation is a similar process mediated by antagonistically acting mediators. The most prominent vasodilator is nitric oxide (termed endothelium-derived relaxing factor for this reason).
Permeability of the endothelium is pivotal in the release of nutrients to the tissue. It is also increased in inflammation in response to histamine, prostaglandins and interleukins, which leads to most of the symptoms of inflammation (swelling, redness and warmth).
Role in diseaseMain article: Vascular diseaseBlood vessels play a huge role in virtually every medical condition. Cancer, for example, cannot progress unless the tumor causes angiogenesis (formation of new blood vessels) to supply the malignant cells' metabolic demand. Atherosclerosis, the formation of lipid lumps (atheromas) in the blood vessel wall, is the most common cardiovascular disease, the main cause of death in the Western world.
Blood vessel permeability is increased in inflammation. Damage, due to trauma or spontaneously, may lead to haemorrhage due to mechanical damage to the vessel endothelium. In contrast, occlusion of the blood vessel by atherosclerotic plaque, by an embolised blood clot or a foreign body leads to downstream ischemia (insufficient blood supply) and possiblynecrosis. Vessel occlusion tends to be a positive feedback system; an occluded vessel creates eddies in the normally laminar flow or plug flow blood currents. These eddies create abnormal fluid velocity gradients which push blood elements such as cholesterol or chylomicron bodies to the endothelium. These deposit onto the arterial walls which are already partially occluded and build upon the blockage.[1]
Vasculitis is inflammation of the vessel wall, due to autoimmune disease or infection.
As i have just learned the heart receives oxygen rich after creating a loop with the lungs .The blood is never entering the frog though because it is always in the frog.
osteoblast
Yes. It depends on the blood vessel and where it is, but yes a rupture to a blood vessel can kill you. A blood vessel is more likely to "pop" or rupture if it has an aneurysm, which is a local weakness where the blood vessel has stretched from the pressure of the blood. This is more likely to result in death if it is in a large blood vessel or in a critical location, such as the aorta or a vessel in the brain.
Medications that expand the blood vessels are called vasodilators (the most common ones are Apresoline and Loniten)
circulatory system
In all honesty, the heart and lungs do. The two sets are very simply pumped back and forth by the heart to and from the lungs to pick up oxygen. there are arteries (going away from the heat to transport oxygen-laden blood cells) and veins (going back to the heart carrying depleted blood cells).
The aorta and pulmonary artery transport blood away from the heart. The pulmonary artery carries de-oxygenated blood to the lungs; the aorta carries oxygen-rich blood to the rest of the body.
Arteries.
No and Yes. The circulatory does contain blood vessels- cappilaries, arteries, and veins. But the circulatory system does not contain the liver, the liver is part of the digestive system.
Air sacs need a rich supply of blood vessels to facilitate diffusion. A large number increases the surface area available to pick up oxygen and get rid of CO2.
Cosmetic surgery is your answer. This can be performed in quite a few ways, depending on the extent of the blemish, including some non-invasive LASER methods. Most of these will be in-office procedures. [[User:Cjonb|Cjonb]] 17:13, 3 Jun 2008 (UTC)
The red fluid that circulates through your body is your blood. It keeps all your body functioning properly, and actually it is not red until it is exposed to oxygen.
Bone is built around the blood vessels that supply it ...
and if the blood supply changes then the bone structure is modified to fit.
Bone is NOT static, unliving stuff, it's a part of the system that makes up you.