Question

Describe the structure of an artery and a vein. Explain how their structure helps in their functioning.

Answer 1

The arteries are the ones that carry the blood far from the heart and experience extreme pressure whereas the vein is that blood vessel that carries the deoxygenated blood from totally different components of the body back to the heart.

Complete answer:
Arteries carry blood far from the heart. Arteries transport blood that encompasses low chemical element content from the proper ventricle to the lungs. General arteries transport ventilated blood from the heart ventricle to the body tissues. Blood is wired from the ventricles into massive elastic arteries that branch repeatedly into smaller and smaller arteries till the branching ends up in microscopic arteries known as arterioles. The arterioles play a key role in the regulation of blood flow into the tissue capillaries. Regarding ten percent of the overall blood, the volume is within the general blood vessel system at any given time.

-The wall of the artery comprises three different layers. The innermost layer, the adventitia tissue layer (also referred to as tunica interna), is straightforward squamous epithelial tissue encircled by a connective tissue basement membrane with elastic fibers. The center layer, the tunica media, is a primarily sleek muscle and is typically the thickest layer. It does not solely provide support for the vessel however conjointly changes vessel diameter to manage blood flow and pressure. The outermost layer, that attaches the vessel to the encircling tissue, is the tunica externa or adventitia tunic. This layer is a connective tissue with variable amounts of elastic and albuminoid fibers. The animal tissue during this layer is sort of dense wherever it's adjacent to the tunic media; however, it changes to lose animal tissue close to the bound of the vessel.
-Veins carry blood toward the gut. When blood passes through the capillaries, it enters the littlest veins, referred to as venules. From the venules, it flows into increasingly larger and bigger veins till it reaches the guts. Within the pneumonic circuit, the pneumonic veins transport blood from the lungs to the (left atrium) of the guts, atrium sinistrum, atrium cordis, the atrium of the heart. This blood contains high chemical element content as a result it’s simply been ventilated within the lungs. General veins transport blood from the body tissue to the correct atrium of the guts. This blood contains reduced chemical element content as a result of the chemical element that has been used for metabolic activities within the tissue cells

Note: The artery carries ventilated blood, nutrients like hormones, enzymes, etc. to the various elements of the body. The arteries have thick-walled. The veins carry the blood towards the center that consists of certain stuff. As compared to arteries the veins have skinny walled.