Capillaries, the smallest and most numerous of the blood vessels, form the connection between the vessels that carry blood away from the heart (arteries) and the vessels that return blood to the heart (veins).
Here the capillaries form a capillary bed, which is a vast expanse of very small vessels forming a network throughout the muscle. However, unlike veins and arteries, their main function is not transporting blood. • Surrounding by a lot of capillaries. Thus, this supply a lot of  blood to the alveoli-diffuse carbon dioxide from deoxygenated  blood and diffuse oxygen into the oxygenated blood.     • The walls of the alveoli are one cell thick. The walls of the capillaries are only one cell thick-capillary walls are made up of a single layer of endothelial cells. Capillary walls are very leaky and have pores … approximately 100nm in length from which essential substances such as oxygen and glucose can diffuse out of and into the tissues. • Surrounding by a lot of capillaries. Thus, this supply a lot of  blood to the alveoli-diffuse carbon dioxide from deoxygenated  blood and diffuse oxygen into the oxygenated blood.     • The walls of the alveoli are one cell thick. Capillaries. Capillaries are the smallest of all blood vessels and form the connection between veins and arteries. As arteries branch and divide into arterioles and continue to reduce in size as they reach the muscle they become capillaries. Capillaries have very thin walls comprised only of endothelial cells, which allows substances to move through the wall with ease. Capillaries are very small, measuring 5-10 micrometres in width. However, the cross-sectional area of capillaries within an average size muscle would be larger than that of the Aorta. Diagram of a capillary. Blood flows from the heart through arteries, which branch and narrow into arterioles, and then branch further into capillaries where nutrients and wastes are exchanged. Capillary beds can consist of two types of vessels: true capillaries, which branch from arterioles and provide exchange between cells and the blood, and short vessels that directly connect the arterioles and venules at opposite ends of the beds, metarterioles, only found in the mesenteric circulation. Each of these air sacs is covered in a mesh of tiny blood vessels called capillaries. The capillaries connect to a network of arteries and veins that move blood through your body. The pulmonary (PULL-mun-ary) artery and its branches deliver blood rich in carbon dioxide (and lacking in oxygen) to the capillaries that surround the air sacs.  Definition. Capillaries are the smallest type of blood vessel in the body. Their job is to enable the exchange of substances between the blood and surrounding tissues. One place where they can be easily seen (no pun intended!) from the outside is on the whites of the eyes. Capillaries are found in every square inch of the body, from the skin to the deepest tissues in the body's cavities. Capillary Function and Structure. Capillaries deliver nutrients and oxygen to tissues and remove the byproducts of cellular reactions, such as carbon dioxide and water. Confidence votes 775. The walls of the capillaries are only one cell thick-capillary walls are made up of a single layer of endothelial cells. Capillary walls are very leaky and have pores approximately 100nm in length from which essential substances such as oxygen and glucose can diffuse out of and into the tissues. The blood can be diverted by a shunt. 1. The blood capillaries are very thin which are just one-cell thick and they are selectively permeable as well so that substances can be exchanged between the blood (plasma) and the tissue cells via simple diffusion. Capillaries. Capillaries, the smallest and most numerous of the blood vessels, form the connection between the vessels that carry blood away from the heart (arteries) and the vessels that return blood to the heart (veins). The primary function of capillaries is the exchange of materials between the blood and tissue cells.  Lymph capillaries connect with larger lymph vessels to drain lymph collected in the microcirculation. During early embryonic development new capillaries are formed through vasculogenesis, the process of blood vessel formation that occurs through a de novo production of endothelial cells which then form vascular tubes. Capillary beds can consist of two types of vessels: true capillaries, which branch from arterioles and provide exchange between cells and the blood, and short vessels that directly connect the arterioles and venules at opposite ends of the beds, metarterioles, only found in the mesenteric  A capillary is an extremely small blood vessel located within the tissues of the body, that transports blood from arteries to veins. Capillaries are most abundant in tissues and organs that are metabolically active. Capillary Size. Capillaries are so small that red blood cells can only travel through them in single file. Capillaries measure in size from about 5-10 microns in diameter. Capillary walls are thin and are composed of endothelium (a type of simple squamous epithelial tissue).
http://www.answers.com/Q/Describe_The_structure_and_function_of_a_capillary http://www.answers.com/Q/Describe_The_structure_and_function_of_a_capillary http://www.teachpe.com/anatomy/capillaries.php https://en.wikipedia.org/wiki/Capillary http://www.nhlbi.nih.gov/health/health-topics/topics/hlw/system http://study.com/academy/lesson/capillaries-function-definition-quiz.html http://www.answers.com/Q/What_does_the_structure_of_capillaries_have_to_do_with_the_function_of_the_capillaries http://training.seer.cancer.gov/anatomy/cardiovascular/blood/classification.html https://en.wikipedia.org/wiki/Capillary http://biology.about.com/od/anatomy/ss/capillary.htm
describe the structure of a capillary network