Three groups of drugs are used to reduce the stickiness of platelets, the tiny blood elements that form the nucleus of a blood clot. By inhibiting the ability of platelets to clump together, the anti-platelet drugs inhibit blood clotting. These drugs are most effective in preventing abnormal blood clots from forming in arteries and are much less effective at preventing thrombosis in the veins. Aspirin and dipyridamole (Aggrenox). These drugs have a modest effect on platelet stickiness but cause fewer bleeding-related adverse effects than the other anti-platelet drugs.
The middle layer of an artery and vein contains mostly. connective tissue. simple squamous epithelium. smooth muscle. nervous tissue. 2. Arteries carry blood. away from the heart. toward the heart. both away and toward the heart.he middle layer of an artery and vein contains mostly. connective tissue. simple squamous epithelium. smooth muscle. nervous tissue. 2. Arteries carry blood. away from the heart. toward the heart. both away and toward the heart.
1. Microscopic vessels that carry blood from small arteries (arterioles) to small veins (venules). 2. They connect arterioles to venules. 3. The capillary wall is composed of only single layers of cells (endothelium) 4.They have no tunica media or adventitia.. The tunica media (middle layer) contain more elastic fibers (hence the name elastic) than smooth muscle smooth muscle 2. These vessels will conduct (hence the name conducting) blood to the muscular arteries 3. They are designated large because the diameter is larger than the medium sized arteries.