Circulatory System

The Circulatory System Introduction The circulative system comprises of the heart, the caudex vessels and blood. It can be thought of as the bodys ingrained commune system, carrying messages and materials from one depart of the body to another.  The system is also central to the of importtenance of homoeostasis, world closely integ putd with the fermentes which control nutrients levels and waste constitution as well as water and temperature regulation. The contract for an internal transport system arose many millions of years ago when an attach in the size of multicellular animate beings became limited by the rate at which gasses and nutrients could be obtained from the external environment by open diffusion. The growing of a simple circulation meant that exchange could be managed by specializer organs much(prenominal) as the catgut and lungs and the products of exchange transported to all of the cells of the body. It would be reasonable to suggest that wit hout the development of the circulation system, animal deportment as we know it today would not subsist - including ourselves! The main functions of the circulatory system can be summarised as follows: * place of respiratory gasses.

Oxygen is transported from the lungs to the tissues for use in zippo production and carbon dioxide, a waste product of this process is transported from the tissues to the lungs for disposal to the atmosphere. * express of nutrients. Glucose, amino acids and other useful substances such as vitamins and minerals ar intent by the gut are transported in the blood to tissu es or sites of repositing such as the liver! . Fats absorbed in the digestive process are initially transported from the gut by the lymphatic system that eventually feeds into the circulatory system. Nutrients released from storage are also transported in the blood to tissues that need them.  * Transport of metabolic wastes. During metabolic processes, tissues produce waste products such as creatinine and urea. These diffuse into...If you want to get a expert essay, fix up it on our website: BestEssayCheap.com

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