✔️1 -MIND MAP OF NUTRITION CH 6 BIO

It is a process to transfer source of energy (food) from outside to the body of living organism to obtain energy for maintaining living structures and performing basic functions of life. Autotrophic Nutrition Heterotrophic Nutrition It is performed by green plants and some bacteria, In heterotrophic nutrition, an organism cannot make its own food and which manufacture their own food from inorganic obtain energy from organic molecules already produced by autotrophs. sources such as carbon dioxide and water. Photosynthesis Holozoic Saprotrophic Parasitic It is a process by which green plants synthesise Complex molecules are They feed on dead organic These organisms live on organic food in form of carbohydrates in the taken in and then broken matter and breakdown or inside host to obtain presence of sunlight and chlorophyll by taking down into simpler form, complex molecules nutrition, e.g. ticks, lice, CO2 and H2O. e.g. Amoeba, cow, goat, outside the body, leech and flatworm. dog and humans. e.g. yeast and bacteria. Site of Photosynthesis Nutrition in Nutrition in Chloroplasts are the main sites of photosynthesis Human Beings that occur in the leaf. They have a green pigment Amoeba is an unicellular omnivore that called chlorophyll that traps solar energy as does not have special organs for nutrition. The complex substances taken from photons and is essential pigment for It ingests food with pseudopodia. outside are broken down in body by photosynthesis. different parts of alimentary canal. Raw Materials for Photosynthesis Human Digestive System G CO2 It forms carbohydrates. Digestion is a catabolic process. Human digestive system consists of a long G Water It forms oxygen. tubular structure (7-8 metre) known as alimentary canal where the entire process of digestion is accomplished and its associated glands. Conditions Necessary for Photosynthesis G Chlorophyll It traps solar energy. G Sunlight It is responsible for photolysis of water. Events of Photosynthesis Alimentary Canal Digestive Glands G Absorption of light energy by chlorophyll. It consists of following organs: G Salivary glands secrete saliva that G Conversion of light energy into chemical G Mouth It act as first part of contains enzyme salivary amylase. Help in digestion of starch. energy and spliting of water molecules into digestive system. Tongue bears hydrogen and oxygen. taste buds which help in tasting of G Gastric glands They are present in G Reduction of carbon dioxide to carbohydrates. food. Teeth helps in chewing of stomach and secrete digestive juice food. It leads to buccal cavity that containing pepsin, HCl and mucus. Mechanism of Digestion opens into pharynx. The latter continues as oesophagus. G Liver It secretes bile juice for This process involves five steps: emulsification of fats. G Ingestion Taking in food into mouth. G Stomach Oesophagus connects G Pancreas It secretes pancreatic juice G Digestion Conversion of complex food into pharynx to stomach, that stores that contains trypsin, amylase and simpler components by the action of various and digest food. lipase enzyme. enzymes. G Intestine It is main organ of G Intestinal glands They secrete G Absorption Digested food is absorbed into blood. digestion and absorption. intestinal juice. G Anus End point of alimentary G Assimilation Distribution of digested food products to cells of body and its utilisation for canal from where waste is energy etc. removed out from the body. G Egestion Elimination of undigested food from anus to outside body.