Digestive System

• Digestion is the process wherein food is broken down into smaller molecules that the body cells can absorb and utilize
• Ingestion is the process of eating and putting food into the mouth
• Transport of food begins where the food is swallowed and continues through the digestive system
• Secretion of materials lubricate, soften and liquify foods to adjust the pH acidity and alkalinity of the food
• Digestion of food is the process of breakdown food into smaller pieces by the action of some accessory organs.
• Absorption brings the final product of digestion from small intestine for distribution via network blood vessels
• Excretion is the process of removing waste products from the body
• What is the arrangement of alimentary tract?

  Mouth-Pharynx-Esophagus-Stomach-Small Intestine-Large Intestine-Rectum-Anus
• what is the organ which ingests food?

  mouth
• what is the organ that breaksdown food in the mouth?

  teeth
• what is the organ that tastes food in the mouth?

  tongue
• what is it called when it produces salivary amylase?

  Ptyalin
• What is it called when it lubricates food changed into ball shape?

  Bolus
• Pharynx is located posterior to the mouth, the passage way for digestion and respiration
• What are the 3 parts of the pharynx?

  Nasopharynx

  Oropharynx

  Hypopharynx
• Epiglottis is the flap like in the pharynx
• Trachea is the wind pipe in the pharynx
• Esophagus is the muscular tube that connects the mouth to the stomach.
• A wavelike contraction called peristalsis facilitates movement of bolus
• Stomach is the pear shaped organ connected to distal end of the esophagus
• Small intestine is a long coiled tube where complete digestion ad absorption takes place
• What are the 3 muscles of small intestine?

  Duodenum

  Jejunum

  Ileum
• Large intestine, also called the colon, stores undigested residue
• What are the 3 regions in large intestine?

  Ascending

  Transverse

  Descending
• Enzymes are protein substances that can initiate or speed up the chemical reaction