Digestive System - Process Of Digestion Journey Of Food
Transcript
00:00hi kids today we will learn about the process of digestion in more detail so
00:09let's start the food enters through the mouth and then with the help of the
00:19tongue the food is moved around the mouth and teeth helps to tear the food
00:26and chew it saliva secreted by salivary glands moistens the food and also helps
00:36in digestion salivary glands are present near the cheeks under the tongue and
00:44around the jaw salivary glands produce about a liter of saliva every day
00:52saliva contains enzymes called amylase which starts the chemical digestion of
00:59food by breaking down the carbohydrates into simple sugar molecules and lysozyme
01:08present in saliva helps to keep the mouth free from germs saliva also
01:17contains mucus that lubricates the food and makes it easy to swallow bolus after
01:27mastication the food is called bolus which is a small round mass of chewed
01:34food bolus goes through the esophagus and reaches the stomach by means of
01:44peristalsis peristalsis refers to the wave-like muscle contractions that moves
01:51the bolus in GI tract that is gastrointestinal tract stomach secretes
02:00the digestive juices called gastric juice that digests proteins gastric juices
02:11HCL and pepsin that kills any germs or bacteria present in food but can also
02:20damage the wall of the stomach so stomach releases mucus that protects the
02:27inner wall of the stomach from acid stomach also performs mechanical
02:35digestion by means of peristalsis peristalsis moves the food and mixes the
02:43food with digestive juices after the one to two hours the food changes to a
02:52liquid state which is called chyme this chyme from stomach now enters a small
03:00intestine in humans small intestine is about six meters long small intestine
03:12it's a digestive juices from the pancreas and liver the digestive juice
03:19from liver is called bile and the digestive juice from the pancreas is
03:25called pancreatic juice the pancreas is a leaf-shaped organ that lies below the
03:35stomach the pancreatic juice contains enzymes that helps the digest
03:42carbohydrates fats and proteins the pancreas is the first organ that start
03:51digesting fats it also contains bicarbonate which neutralizes the acid
03:58from the stomach produces a digestive juice called bile which is stored in the
04:06gallbladder the most important and main function of the small intestine is
04:15absorption of nutrients and minerals from food and almost all the water
04:23nutrients and minerals are absorbed by the blood cells and becomes part of our
04:31body here now after absorption of most of the water nutrients and minerals the
04:41food enters the large intestine which is about 1.5 meters long and there the
04:51water and minerals are absorbed from the remaining indigestible food and whatever
04:58is left after absorbing all nutrients minerals and water is discharged or
05:06removed through the rectum and anus so kids today we learned the process of
05:15digestion now you may go ahead and take a quiz to learn more bye bye