Physiology : a manual for students and practitioners . between Fig. Valves of the Heart. these is an elastic layer of fibrous tissue, which has interlaced inits structure muscle-cells. Each artery has its own vasa vasorum,or nutrient vessels, and is usually enmeshed in a plexus of sympa-thetic nerves, vaso-motor nerves. Describe the capillaries. The capillary blood-vessels are channels of very small butvariable size, but usually of about sufficient calibre to just permitthe passage of the red and white corpuscles. They are usuallycomposed of a single layer of endothelial cells joined at th
Physiology : a manual for students and practitioners . between Fig. Valves of the Heart. these is an elastic layer of fibrous tissue, which has interlaced inits structure muscle-cells. Each artery has its own vasa vasorum,or nutrient vessels, and is usually enmeshed in a plexus of sympa-thetic nerves, vaso-motor nerves. Describe the capillaries. The capillary blood-vessels are channels of very small butvariable size, but usually of about sufficient calibre to just permitthe passage of the red and white corpuscles. They are usuallycomposed of a single layer of endothelial cells joined at the edges,though near the arteries and veins there is sometimes an elasticfibrous coat. A sympathetic nerve-plexus surrounds these capillaries form a complicated network in the tissues, and themesh of the net varies in shape and size greatly with the vascu-larity and function of the tissue. Describe the characteristics of the veins. In structure the veins are similar to the arteries, but much less CIRCULATION OF TlIK 5. 31
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectphysiology, bookyear1
