Describe double circulation in human beings why is it necessary

Question 1. What processes would you consider essential for maintaining life? Answer. Nutrition, respiration, transportation and excretion. Question 2. Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans? Answer. In multicellular organisms, only the cells present in the surface layer are in direct contact with the surrounding environment, whereas other cells are not. Therefore, diffusion is insufficient to meet the oxygen requirements of multicellular organisms like humans. Question 3. What criteria do we use to decide whether something is alive? Answer. Growth, movement or locomotion, response to, stimuli and ability to reproduce are the criteria that we use to decide whether something is alive. Question 4. What are outside raw materials used for by an organism? Answer. The outside raw materials used for by an organism are: (a) Food for obtaining energy. (b) Oxygen to use it in the process of breakdown of food sources for cellular needs. Question 5. Where do plants get each of the raw materials required for photosynthesis? Answer. Plants get carbon dioxide from atmosphere. It gets water and minerals from the soil. Question 6. What is the role of the acid in our stomach? Answer. The acid (hydrochloric acid) formed in our stomach helps in killing unwanted harmful germs which may have gained entry along with the food. It is secreted by the gastric glands creates an acidic medium which facilitates the action of the pepsin enzym...

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Double Circulation The circulatory system is responsible for the transportation of nutrients and gases like oxygen, for the body and metabolic waste products away from the body. The heart and the lungs play an important role in circulating and purification of blood throughout the body. But is the heart the only organ that helps in purification? Let’s have a brief study on double circulation and the relevant organs involved. Types of Circulatory Systems In animals, there are two types of circulatory systems: open circulatory system and closed circulatory system. The majority of mammals, including humans, use a double circulatory system. The closed • Single Circulation In a single circulatory system, the blood will pass through the heart to gills, then after purification, blood will be distributed to different parts of the body. Only one cardiac cycle is completed, hence the name single circulation. For example: single circulation is mainly seen in birds, fish, reptiles, etc. • Double Circulation The heart is the key organ for blood circulation and the double circulation is an efficient way of circulation as it provides an effective way of circulation. The main difference is that the blood follows two routes – one for oxygenated blood and the other for deoxygenated blood. Hence, the name “double circulation.” The majority of mammals, including humans utilize a double circulatory system. The • Left Atria • Right Atria • Left Ventricles • Right Ventricles Further, the he...

ever talked about this question and this question was asked to describe double circulation of blood in human beings why is it necessary so basically if we talked about the double circulation right ever talked about the double circulation so the circulation in human being is double circulation why it is called double circulation because in case of the human beings blood right blood flows through the heart to X right blood flows through the heart 2 times in one cycle right so the complete circulation of blood in humans is known as a double circulation discuss the blood is flowing through the heart in is flowing through the heart to X right hand the reason is static circulation in case of a human beings is considered as double circulation now we talked about the two types of circulation of the two steps involved write the two circulation the two steps involved here are basically number one is the pulmonary circulation right pulmonary circulation right so in this circulation what happens is that the blood flows right that the blood flows or passes from heart to lungs right heart to lungs and back to the heart right so basically the circulation takes place between heart and lungs right and the others circulation is basically the systemic circulation write the other circulation is the systemic circulation this basically what happens is that the heart pumps the blood heart pumps blood to other body parts right to other body parts heart pumps deoxygenated blood to other body parts...

The heart receives deoxygenated blood from different parts of the body, and it pumps this blood to the lungs. The oxygenated blood from the lungs returns to the heart, which is pumped again into different parts of the body by the heart. Thus, the blood passes twice through the heart making one complete round through the body. This is called double circulation. Pulmonary and systemic circulation The pulmonary circulation pertains to lungs. The blood flows from the right ventricle to the lungs. Pulmonary veins collect oxygenated blood from the lungs and carry it back to the heart (left auricle). The systemic circulation pertains to the major circulation of the body. The aorta receives the blood from the left ventricle and sends it to the various parts of the body. Veins collect the deoxygenated blood from the body parts and pour it back into the right auricle.