interbreeding Over
During meiosis, when homologous chromosomes are paired together, there are points on the chromosomes that make contact with the other pair. This point of contact is deemed the chiasmata, and can allow the exchange of genetic information between chromosomes. This shape up increases genetic variation.
* Blood Vessels - are intricate networks of hollow tubes that contain phone line through bulge the entire body.
* Arteries:
* These blood vessels transport blood away from the heart. Arteries are thick, muscular walled structures compared to veins as they are knowing to accommodate the high flow and pressures exerted by the force delivered by the heart. In larger arteries, e.g.Aorta, more elastic tissue is contained at bottom the tunica media but has less smooth muscle.
* Arterioles:
* Smaller diam blood vessels with thin muscular walls that extend and branch out from an artery and leads to capillaries. These vessels are the primary site of vascular resistance.
* Capillaries:
* Smallest of a bodies blood vessels, measuring just 5-10 ?m in diameter. Capillaries splice arterioles and venules. The walls of the capillaries are only one cell thick which enables the tack of water, oxygen, carbon dioxide, nutrients and waste products from the blood and surrounding tissues.
* Venules:
* A nice blood vessel that drains deoxygenated blood from the capillary beds to return to the larger blood vessels called veins. Many...If you want to get a full essay, order it on our website: Orderessay
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