stay connected

  The  dental formula of human is 2123/2123 The buccal cavity has 3pairs of salivary gland located at different locations The parotid gland lies on the side of face. Sub lingual gland under the front part of the tongue Submaxillary gland lies at the angle of lower jaw. These salivary glands secret saliva through their ducts. Saliva contain water, salt, musings , ptyalin, The ptyalin Not to be noted Carbohydrate - : Commonly known as saccharides  also knows as sugar it has many types Monosaccharides - one molecule of sugar eg. Glucose Disaccharides - 2 Molecules of sugar eg. Sucrose,(from sugarcane) lactose ( milk) , maltose(chapattis and in rice) sugarcane juice, sugar crystals Poligosaccharides - 10 molecules of sugar Polysaccharide - many sugar molecules eg. Starch, Our cell receives only monosaccharides type of carbohydrate. The enzyme ptyalin the starch and glycogen into maltose. Thus, carbohydrate digestion begins in the buccal cavity itself which is ...

 1.,Humans obtain their food from plants, animals, and their product by holozoic mode of nutrition. 2. The essential component of human diet are water, carbohydrate, fat, protein, roughage, vitamins and minerals. 3. The human digestive system consists of an alimentary canal and many digestive glands. STRUCTURE AND FUNCTION OF MAIN ORGANS OF ALIMENTARY CANAL AND ASSOCIATED DIGESTIVE GLAND The alimentary canal is a long tube with mascular walls, it extend from mouth to anus. The uncoiled alimentary canal measures generally 9m long in which and it is several ducts of digestive gland open to secrete their digestive secretions These organs are given below in order in which they are involved in the digesting food mouth 2. Buccal cavity 3. Pharynx  4. Oesophagus 5. Stomach 6. Small intestine 7. Large intestine Mouth - : It is a uppermost opening gives passage for ingestion of food. It is cover by 2 soft lips and opens in to a chamber called buccal cavity or oral cavity. Buccal cavit...

 MODES OF NUTRITION - : There are large number of organisms and they live in different environment conditions. The have various methods of obtaining food by the organisms. This is called MODES OF NUTRITION. Depending on the modes of obtaining nutrients every organism is classified into two groups. 1. Autotrophic - : Auto means self and trophic means nutrition or food. It is a kind of nutrition in which organism prepare or synthesize there own organic food utilising only the raw materials present in surrounding. 2. Heterotrophic - : It is a kind of nutrition in which organism receive energy from the intake and Digestion of organic substances prepared by autotrophs and other organic sources. Difference between organic and inorganic substances-: 1. Organic - : Substance which contains carbon oxygen and hydrogen.  2. Inorganic - : Substance which does not contain carbon oxygen and hydrogen.  THANK YOU so much  Dewanshu rai 

 Green plants are autotrophic is means that they synthesis own organic food by the process of photosynthesis.  PHOTOSYNTHESIS - : Plant synthesize there food with the help of light which means sunlight.  It is the important process by which green plants synthesize simple food like starch, carbohydrates and evolve molecular oxygen from simple organic substance like carbon dioxide and water with the help of light energy.                                       OR The process of photosynthesis can be defined as the conversion of photonic energy (solar energy or radiant energy) into two chemical energy 1. locked in high energy bonds of carbohydrate. 2. By the green parts of plants.  Photosynthesis is most important anabolic process Metabolic have two types 1. Anabolic It is a constructive process which was done by plants in photosynthesis. 2. Catabolic It is a destructive pr...

 Thllakoids - Stacks of grans which is pocket like structure and form compact granum. Thylakoids of one granum connected to other granum with the help of lamella called stroma lamellae which is also known as fret channel and named after the scientist FRET. The green colour photosynthetic pigments chlorophyll and caretenoids are located in the membrane of thllakoids. These are the site of light reaction of photosynthesis. RAW MATERIALS FOR PHOTOSYNTHESIS - : Green plants takes carbon dioxide and water from surrounding environment and convert them into simple carbohydrate ( many sugar molecules ) starch. Thus carbon dioxide and water h20 are the raw materials for photosynthesis. The terrestrial plants get carbon dioxide through stomata present on epidermal layer (epidermis) very small pores made up of two v shape (kidney shape) guard cells who control the opening and closing of stomata. The aquatic plants (hyrophytes) take dissolve form of carbon dioxide to the guard surface of plant...

 The rate of photosynthesis process is affected by several external ( enviromental) internal factor, these factors are Temperature Light Water Carbon dioxide 1. Light The ultimate source of light for photosynthesis is solar radiation. Out of total solar energy reaching to the earth, only a very small portion ( about 2%) is used in photosynthesis. Light varies in intensity, quality ( wavelength ) and duration. Under low light intensity the rate of photosynthesis is also low. At very high light intensity the photosynthesis is decreased due to photo oxidation of constituents. The quality or wavelength of light also affect photosynthesis. For eg. Green pigment chlorophyll mostly absorb blue and red light they reflect green light. Therefore photosynthesis is high in blue or red light and very low in green light 2. Temperature The rate of photosynthesis increase by increase in temperature upto 40°C. Above 40°C there is decrease in photosynthesis process. Similarly low temperature also st...