Organs of digestive system

• The digestive system starts from the mouth.
• The vestibule is the space which is contained externally by the

  lips and cheeks
• The palate, tongue, and teeth

  constitute the oral cavity.
• the tongue is responsible for tasting, mixing, and swallowing

  food.
• A complete permanent set of teeth numbers is 32.
• Incisors are found at the front portion of the mouth. They have sharp

  ends to cut food
• Canines are locatedimmediately after the incisors. They are also

  sharp, and pointed teeth meant for tearing food.
• Premolars have a flat surface. These teeth are responsible for tearing and crushing.
• The teeth functions to physically break the food down.
• • Incisors: cutting
  • Canines: tearing
  • Premolars: tearing, crushing
  • Molars: grinding, crushing
• The pharynx connects the mouth to the esophagus.
• • Nasopharynx: passage of air only
  • Oropharynx: passage of food and air
  • Laryngopharynx: passage of food only
• Epiglottis is a cartilaginous tissue that prevents the entry of food and water into the respiratory tract. .
• The Gastrointestinal Tract: Esophagus, Sphincters, stomach, small intestine, large intestine
• Esophagus is a long muscular tube where food travels from the mouth to the stomach.
• Sphincters prevent the backflow of food.
• The stomach is hollow and curved organ that functions for

  storage and breakdown of food. It produces acids, mucus, and enzymes that helps in digestion.
• The inner walls have folds known as rugae allow the stomach to

  stretch to store large meals.
• The stomach has three sections: the cardia, the fundus, and the

  pylorus.
• The small intestine is a long tube where the final digestion takes place.
• The large intestine is the final organ

  of the digestive system. It is the site for vitamin and water

  absorption.
• The Accessory Organs: Salivary glands, pancreas, liver, gallbladder
• Salivary glands secrete saliva into the mouth which clean the teeth, lubricate the food, and allow chemical digestion.
• The liver, the second largest organ, produces bile which aids in lipid digestion.
• The gallbladder stores and holds the bile until it is needed in the duodenum.
• Pancreas is a yellowish organ that secretes pancreatic juice. This is essential in breaking down proteins, fats, and carbohydrates in food.