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Life Processes

NCERT CHAPTER 6 (Terms)

TermDefinition
Nutrition The process of taking in food by an organism and its utilization by the body for life processes
Respiration The process by which food is burnt in the cells of the body with the help of oxygen to release energy
Transportation The process by which food, water, air or waste products are transported from one part of the body to another
Excretion The process of removal of waste products from the body
Autotropic Nutrition The nutrition by which an organism makes its own food with simple inorganic substances like CO2 and H2O in the presence of Sunlight and Chlorophyll
Heterotrophic Nutrition The nutrition in which an organism gets its food from plants directly or indirectly
Saprophytic Nutrition The nutrition in which organisms get their food from dead and decaying organisms which the break down outside their body and then absorb it
Parasitic Nutrition The nutrition which involves organisms getting their food from living organisms (host) without killing them
Holozoic Nutrition The nutrition in which organism get their food directly and the absorb it
Photosynthesis The process by which a plant prepares food by using CO2 and H2O in the presence of sunlight and chlorophyll, the food prepared is carbohydrates and it is stored in the form of starch (Oxygen is also released in this process).
Chlorophyll The green pigment present in leaves When observing the cross-section of a leaf we will notice green dot like structures called chloroplasts, these contain Chlorophyll.
Stomata Tiny pores used to exchange gases, each stoma ha two pairs of guard cells which controls the opening and closing of the stomatal pore. When a guard cell gains water it swells and the pore opens and when they lose water, they shrink and the pore closes.
Enzymes Enzymes are biological catalysts, which are almost always proteins. hey speed up the rate of specific chemical reactions that take place inside the cell. The enzymes are not destroyed during this process and can be used again and again.
Ingestion Process of intake of solid/liquid food via mouth
Digestion Conversion of complex, insoluble and non-absorbable food into a simple , soluble, absorbable form using various enzymes
Absorption Entry of digested food molecules (nutrients) into blood
Assimilation Utilization of nutrients for body functions
Egestion Removal of fecal matter (waster products) via anus (defection)
Created by: Khushi_B
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