Sign up now
to enroll in courses, follow best educators, interact with the community and track your progress.
Download
Human Physiology: Part 1
1,232 plays

More
This lesson covers Human Physiology from the Class 11 NCERT textbook in detail.

Nikhil Puranik
I'm a mechanical engineer, defence analyst and writer. I love to teach.

Unacademy user
It is the ncert book written in points and subtitles. Not a summary
good explanation, helping in clearing basics.thank u sir
thank you very much sir..can you please continue the course
  1. HUMAN PHYSIOLOGY-1 BY NIKHIL PURANIK


  2. ABOUT MIE MY NAME IS NIKHIL PURANIK PURSUING B.E IN MECHANICAL ENGINEERING FROM RNSIT LIVE IN BENGALURU PROFILE https://unacademy.com/user/nikhilrpuranik


  3. TOPICS COVERED DIGESTIVE SYSTEM MOUTH OESOPHAGUS SMALL AND LARGE INTESTINE COLON AND RECTUM WALLS OF ALIMENTARY CANAL DIGESTIVE GLANDS DIGESTION OF FOOD ABSORPTION OF DIGESTED PRODUCTS DISORDERS OF DIGESTIVE SYSTEM


  4. DIGESTIVE SYSTEM Food is one of the basic requirements of all living organisms. Food provides energy and organic materials for growth and repair of tissues. Biomacromolecules in food cannot be utilized by our body in their original form. They have to be broken down and converted into simple substances in the digestive system. This process of conversion of complex food substances to simple absorbable forms is called digestion and is carried out by our digestive system by mechanical and biochemical methods 4


  5. Oral cavity Mouth Submaxillary and Parotid gland Pharynx sublingual glands Oesophagus Liver Gall bladder - Stomach Pancreas Duodenum Transverse colon Ascending colon Jejunum Descending colon Ileum Caecum Vermiform appendix Rectum Anus


  6. MOUTH The alimentary canal begins with an anterior opening the mouth, and it opens out posteriorly through the anus. The mouth leads to the buccal cavity or oral cavity. The oral cavity has a number of teeth and a muscular tongue. Each tooth is embedded in a socket of jaw bone. This type of attachment is called thecodont. Majority of mammals form two sets of teeth during their life, a set of temporary milk or deciduous teeth replaced by a set of permanent teeth This type of dentition is called diphyodont. 6


  7. An adult human has 32 permanent teeth which are of four different types (Heterodont dentition), namely, incisors (I), canine (C), premolars (PM) and molars (M) Arrangement of teeth in each half of the upper and lower jaw in the order I, C, PM, M is represented by a dental formula which in human is 2123 2123 The hard chewing surface of the teeth, made up of enamel, helps in the mastication of food. The tongue is a freely movable muscular organ attached to the floor of the oral cavity by the frenulum. The upper surface of the tongue has small projections called papillae, some of which bear taste buds. 7


  8. Incisor Canine , 4 Premolars Socket of jaw Molars


  9. OESOPHAGUS The oral cavity leads into a short pharynx which serves as a commorn passage for food and air. The oesophagus and the trachea (wind pipe) open into the pharynx. A cartilaginous flap called epiglottis prevents the entry of food into the glottis - opening of the wind pipe during swallowing. The oesophagus is a thin, long tube which extends posteriorly passing through the neck, thorax and diaphragm and leads to a J shaped bag like structure called stomach. 9


  10. STOMACH A muscular sphincter (gastro- oesophageal) regulates the opening of oesophagus into the stomach. Oesophagus Fundus The stomach, located in the upper left portion of the abdominal cavity, has three major parts Cardiac Superior portion of duodenum A cardiac portion into which the oesophagus opens, a fundic region and a pyloric portion which opens into the first part of small intestine. Pyloric 10