Organism depends on other organisms for food. Following are the life processes in living beings: Various functions carried out by living beings, which are necessary to maintain and continue life are called life process. Depending on the complexity of molecules in food, different living beings follow different modes of nutrition. In this section, you will read about different types of nutrition. These processes are called life processes So, it can be said that there are certain processes in a living being which are necessary to maintain life. These raw materials come through food.įood is further converted into energy so that various movement can take place. They need some raw materials for doing that. Living beings need certain processes to replace worn out parts. These movements can be on the scale of molecules or on the scale of cells. Various movements, which may not be apparent from outside take place inside a living being. How do we say that such organisms are living beings. It removes nitrogenous wastes from the blood.But we are unable to see movement or nutrition or growth or breathing in many living beings. It removes carbon-dioxide from the blood. It is thin walled, has a large surface area and is richly supplied with blood vessels. It is the structural and functional unit of kidneys. It is the structural and functional unit of lungs. The transport is bidirectional i.e., from source to sink.Ĭompare the alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning. The transport is unidirectional i.e., from roots to tip. What are the differences between the transport of materials in xylem and phloem? Breathlessness, tiredness, weakness are the symptoms of anaemia. If there is deficiency of haemoglobin then amount of oxygen reaching our body cells will decrease which may lead to release of less energy in our body, leading to a disease called anaemia. Haemoglobin is a red pigment present in our blood which carries oxygen to all the parts of the body. What would be the consequences of the deficiency of haemoglobin in our body? The energy demands for human beings is too high and hence the separation of oxygenated and deoxygenated blood is necessary to meet this energy demand. The left side of heart receives oxygenated blood from the lungs which is pumped further and sent to all the parts of the body through blood vessels. The right side of the heart receives deoxygenated blood and sends it further for purification to lungs. The heart of human beings consists of two sides - right and left. They are balloon shaped structures which increase the surface area for the exchange of gases and are richly supplied with blood vessels.ĭescribe double circulation in human beings. The alveoli are present at the terminal of bronchioles. How are the alveoli designed to maximize the exchange of gases? Some organisms that use the anaerobic mode of respiration are - yeast, bacteria. Incomplete oxidation of gluclose takes place. It takes place in cytoplasm and mitochondria.Ĭomplete oxidation of glucose takes place. Its end products are ethanol and carbon dioxide. Its end products are carbon dioxide and water. What are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration?ĭifferences between aerobic and anaerobic respiration are as follows : The by-product of autotrophic nutrition is oxygen which is released through stomata. What are the necessary conditions for autotrophic nutrition and what are its by- products?įor autotrophic nutrition to take place the conditions necessary are - light, chlorophyll, carbon dioxide and water. It breaks down starch into sugar (complex carbohydrates into simpler ones). Saliva contains salivary amylase and is released in our mouth. What is the role of saliva in the digestion of food? The bile also makes the medium alkaline so that the pancreatic enzyme, lipase further digest fats to form fatty acids. The secretion of liver, called bile, breaks down the large globules of fat into smaller globules. How are fats digested in our bodies? Where does this process take place?įats are digested in the small intestine. The breakdown of pyruvate to give carbon dioxide, water and energy takes place in The autotrophic mode of nutrition requires The kidneys in human are a part of the system for
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