Digestive system
Activities during digestion of food : 1. Ingestion : - Taking food inside alimentary tract ( Oral Cavity 2. Propulsion - Movement of food in alimentary tract . 3. Digestion - Mechanical breakdown of food by mastication and chemical digestion by enzymatic action . 4. Absorption : - Transfer of digested form of food from alimentary canal blood and lymphatic capillaries . 5. Elimination - Excretion of undigested food as faeces by process of defecation . DIGESTIVE SYSTEM ORGANS Digestive system is made up of gastrointestinal tract or alimentary canal and accessory organs . Primary digestive organs are 1. Mouth 2. Pharynx 3. Esophagus 4. Stomach 5. Small intestine 6. Large Intestine - Accessory digestive organs are 1. Exocrine part of pancreas . 2. Liver 3. Gall Bladder 4. Salivary glands . Wall of Gastrointestinal Tract : - In general , wall of GI tract is formed by four layers which are from inside out are - ( i ) Mucus layer ( GI mucosa / mucus membrane ) formed by epithelial tissue...