Explain the physiology of circulation in heart using well labelled diagram.

Explain the physiology of circulation in heart using well labelled diagram

The physiology of single -celled organisms and basal multicellular animals such as sparges is ofter simple. For example the small size large surface to volume ratio of microorganisms allows them to attain regulation by diffusion across the cell membran Similarly secuater circulates thorough the pores of sponges, carrying nutrients and waste products to and from its celle. More complex animals have developed circulatory systems to moves blood throughout the blood body to transport nutrients wats products. hormones and other molecules while the respiratory systems allow goes exchange between the circulatory systems and the external environment.

→ The circulatory system in animals can be open open circulatory system are typically present in many invertebrates and consist of one or closed. more simple hearts. a vessel network and interconnected spaces that directly, bathe internal organs in a fluid that allows exchanges of materials. Vertebrates have closed circulatory systems, in which blood is confined inside a closed vesst system which branching extensively into the tissues to ensure mateixal exchange. This closed vessel system is connected to a heart with veins carrying blood from tissues towards the heart and arteries carrying blood from the heart to the rest of the body. Four-chambered hearts, such as in human are Oxygen associated with two loops of vessel. In human depleted blood from organs enter the heart through the right afrium which contracts to push bload to the right ventricle, which in turn sends blood to the lungs. Following exchanges in the lungs oxygen- rich blood returns to gibe chi abium and is later pused into the left ventricts. This final chamber is more muscular than the others and with a strong contraction is able to pump the blood to the rest of the body.

→ Closed circulatory system allow rapid circulation of A bloed which in turn enables fast and efficient transport of substances throughtout the body as well as higher bloed pressure than in open system. The blood pressure is generated by the contraction of the heart ventrictes as blood is forced into the arteries. As the ventricles. of the heart relax, the blood pressure decrease.

- One of the most important organ systems that define an organism's physiology is circulatory system which transports bloock, nutrients oxygen and hormone throughout the body. In humans, a measure of the circulatory system function can be obtained by taking the blood pressure.