Presentation on theme: "TOPIC :---LIFE PROCESSES CLASS :--- 10th"— Presentation transcript:
1TOPIC :---LIFE PROCESSES CLASS :--- 10th CONSTRUCTIVIST PLANTOPIC :---LIFE PROCESSES CLASS :--- 10thSUB -TOPIC :- NUTRITION IN HUMAN BEINGS
2RMSA Team Kishori Lal ,Lect. Biology,GSSS Saigaloo,SRG Bharat Kashyap,Lect.Biology,GSSS Majhwar,SRGJanaki Dass.Lect.Biology,DIET,Kullu,SRG(Valuable suggestions are always welcome)
3GENERAL OBJECTIVES :-To Promote Spirit of enquiry, Experimentation and Observation.To interpret the impact of various phenomenon in our daily life.To promote problem solving and decision making attitude.To inculcate scientific attitude.To make the students aware about the contextual knowledge .
4SPECIFIC OBJECTIVES The student will be able to:- explore various life processes; explore modes of nutrition;explain digestion in human beings;know the structure and functioning of human respiratory system;describe the structure and functioning of human heart;explain structure and functioning of human excretory system.
5MOTIVATION Look at these images:- Flesh Eating Breathing Breathing Eating fruitsFlesh EatingBreathingBreathingUrinating
6Presentation by teacher Why do we take food?What does the food contain?Where does the food go in our body?What happens to food in our body?How food is digested in our body?Human beings are heterotrophic organisms. They obtain their food from plants, animals and animal products .They take this food in complex form (starch, proteins, fats)which are broken down into simpler substances ( glucose , amino acids ,fatty acids etc.)Digestive glands present in our body help in breaking the food.The human digestive system consists of alimentary canal and associated glands.
7Digestive system Alimentary canal Mouth Buccal cavity Stomach Small intestineLarge intestineRectumanusDigestive GlandsSalivary glandGastric glandLiverPancreasIntestinal gland
8ALIMENTARY CANALIt is a 9 metre long tube with muscular walls and glandular epithelium which extends from mouth to anus.The alimentary canal consists of several organs.
9MOUTH It is the uppermost opening of the digestive system . It is guarded by two soft movable lips.It opens into buccal cavity.
10BUCCAL CAVITYIt is a large space bounded by upper immovable and lower movable jaw which bears four types of teeth and a soft muscular tongue.The buccal cavity has three pairs of salivary glands.The saliva contains water ,mucus and salivary amylase(ptyalin ) .
11PharynxIt serves as a passage for food from buccal cavity to the oesophagus.OesophagusThe oesophagus is a long tubular structure which serves to carry the food from pharynx to stomach by peristaltic movement.
12StomachIt is wide J-shaped muscular sac present on the left side of the abdomen .It consists of four parts.The walls of the stomach possesses three types of gastric glands which secrete gastric juice containing HCl, pepsin protein digesting enzyme & mucus.It serves three functions1. Storage of food2. Mechanical churning of food3. Partial digestion
13Small intestine It is largest part of alimentary canal. It is about 6m. long tube.It consists of three parts –duodenum , jejunum and ileum.duodenumjejunumileum
14Digestion and absorption of food is completed with the help of various enzymes in small intestine. Bile coming from liver helps to emulsify the fat.
15The wall of small intestine is raised into numerous projections called VILLI. The villi greatly increases the absorptive surface area of the inner lining of intestine..Structure of Villi
16LARGE INTESTINE It is shorter but wider than small intestine. It consists of three parts - caecum, colon and rectum.It is arranged around the mass of small intestine in the form of a ? .It lacks villi but secretes mucous.
17GROUP FORMATION Group 1. (a) Give the functions of bile juice. (b) Frame one question at your own and answer it.Group 2. (a)Name types of enzymes involved in the digestion of food.Group 3 (a)Draw the flow chart of digestive system.Group 4.(a) Match the following : ---Liver Secretion of HCL & mucusSmall Intestine Absorption of waterGall bladder Completion of digestionGastric gland Bile stored
18EVALUATION ……. In the stomach kills germs. The saliva contains an enzymes calledThe rhythmic movement by which the food is taken to the stomach through food pipe is called……………..Is secreted by the liver.Name the longest part ofalimentary canal.The inner lining of small intestine has numerous finger like projections calledHClPtyalinPeristalsisBileSmall intestineVilli
19Home assignmentsDraw a well labelled diagram of human digestive system.Make a list of different resources of carbohydrates, proteins and fats.
21KNOWLEDGE LEVEL Peristalsis b. Dialysis c. Exocytosis d. Endocytosis 1. Give the term to the rhythmic contraction of alimentary canal.Peristalsis b. Dialysisc. Exocytosis d. Endocytosis2. Where is the bile produced ?Gall bladder b. Liverc. Pancreas d. Small intestine3. Name the largest gland in human body:Pancreas b. Thymusc. Liver d. Salivary4. Which is the longest part of the alimentary canal?5. Which organ is associated with the secretion of insulin?6. Which is the vestigial organ in the alimentary canal?Which part of the alimentary canal is responsible for complete digestion of fats, carbohydrates and proteins?List the various life processes.
22UNDERSTANDING LEVELName the enzymes for the digestion of carbohydrates.Name the enzymes for the digestion of proteins.Name the enzymes for the digestion of fats.4. Which salt is responsible for emulsification of fats?Name different parts of stomach.Where does mechanical churning take place.Name different parts of small intestine .
23APPLICATION LEVEL1. How do villi enhance absorption of food in the intestine:By Increasing the surface area.By decreasing the surface areaBoth a) and b) d. none of the above2. Explain the importance of nutrition.3. What are the different modes of nutrition?4. Explain the role of HCl in digestion.
24Analysis level1. Match the terms in column I to those in column II Column I Column II i.) insulin a) Liver ii) Amylase b) Gastric glands iii) Bile c) Pancreas iv) Pepsin d) Saliva . 2. Explain various modes of heterotrophic nutrition.
25Synthesis level1. The correct order of steps occurring in nutrition in animal is: a. Ingestion--->absorption--->digestion--->assimilation--->egestion b. Ingestion--->digestion--->assimilation--->egestion c. Ingestion-->digestion-->absorption-->assimilation-->egestion d. Ingestion-->assimilation-->digestion-->absorption-->egestion 2. Which of the following is the correct sequence of parts as they occur in the human alimentary canal? a. Mouth--->stomach--->small intestine--->oesophagus--->large intestine b. Mouth--->oesophagus--->stomach--->large intestine--->small intestine c. Mouth--->stomach--->oesophagus--->small intestine--->large intestine d. mouth --> oesophagus --> stomach --> small intestine --> large intestine 3. Draw a well labeled diagram of digestive system. 4. Explain the phases of digestion in human beings. 5. Explain Role of pancreas in digestion. 6. Explain Role of bile in digestion.
26Synthesis level7. On a sheet of paper, write the name of each colored organ:Green:Red:Pink:Brown:Purple:Yellow:
27Evaluation level Explain the structure & function of digestive system? Explain the role of bile.Describe different parts of small intestine ?Where are the villi are found in our alimentary canal .Also show their role in digestion.