[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:01.47,0:00:03.72,Default,,0000,0000,0000,,Digestion is the process by which
Dialogue: 0,0:00:03.72,0:00:05.71,Default,,0000,0000,0000,,the gastrointestinal system
Dialogue: 0,0:00:05.71,0:00:08.22,Default,,0000,0000,0000,,retrieves important nutrients for
Dialogue: 0,0:00:08.22,0:00:10.25,Default,,0000,0000,0000,,the body, and chemically changes
Dialogue: 0,0:00:10.25,0:00:12.70,Default,,0000,0000,0000,,the unused food into waste.
Dialogue: 0,0:00:14.12,0:00:16.37,Default,,0000,0000,0000,,Mastication, or the chewing of food
Dialogue: 0,0:00:16.37,0:00:18.27,Default,,0000,0000,0000,,in the mouth, is the first step
Dialogue: 0,0:00:18.27,0:00:19.31,Default,,0000,0000,0000,,of digestion.
Dialogue: 0,0:00:20.18,0:00:23.28,Default,,0000,0000,0000,,Saliva initiates digestion, and changes
Dialogue: 0,0:00:23.28,0:00:26.00,Default,,0000,0000,0000,,the chewed food into a soft mass
Dialogue: 0,0:00:26.00,0:00:27.04,Default,,0000,0000,0000,,or bolus.
Dialogue: 0,0:00:27.88,0:00:30.29,Default,,0000,0000,0000,,Saliva makes the bolus slippery
Dialogue: 0,0:00:30.29,0:00:33.36,Default,,0000,0000,0000,,making it easier to be swallowed and slide
Dialogue: 0,0:00:33.36,0:00:36.03,Default,,0000,0000,0000,,down the back of the throat and esophagus.
Dialogue: 0,0:00:36.76,0:00:38.34,Default,,0000,0000,0000,,The bolus passes through the
Dialogue: 0,0:00:38.34,0:00:40.92,Default,,0000,0000,0000,,esophageal sphincter before it enters the
Dialogue: 0,0:00:40.92,0:00:41.78,Default,,0000,0000,0000,,stomach.
Dialogue: 0,0:00:42.49,0:00:45.41,Default,,0000,0000,0000,,Inside the stomach, hydrochloric acid is
Dialogue: 0,0:00:45.41,0:00:46.46,Default,,0000,0000,0000,,released.
Dialogue: 0,0:00:46.70,0:00:49.27,Default,,0000,0000,0000,,Breaking down large food molecules into
Dialogue: 0,0:00:49.27,0:00:51.86,Default,,0000,0000,0000,,smaller ones, and liquifying the bolus.
Dialogue: 0,0:00:52.41,0:00:55.68,Default,,0000,0000,0000,,The liquified bolus, now called chyme
Dialogue: 0,0:00:55.68,0:00:58.39,Default,,0000,0000,0000,,then passes through the pyloric sphincter
Dialogue: 0,0:00:58.39,0:01:00.48,Default,,0000,0000,0000,,and enters the duodenum,
Dialogue: 0,0:01:00.48,0:01:02.66,Default,,0000,0000,0000,,the first section of the small intestine.
Dialogue: 0,0:01:02.94,0:01:05.48,Default,,0000,0000,0000,,It is here that enzymes released from the
Dialogue: 0,0:01:05.48,0:01:07.59,Default,,0000,0000,0000,,pancrease, liver, and gall bladder
Dialogue: 0,0:01:07.59,0:01:10.52,Default,,0000,0000,0000,,further break down chyme into elements
Dialogue: 0,0:01:10.52,0:01:12.96,Default,,0000,0000,0000,,that can be easily absorbed and used
Dialogue: 0,0:01:12.96,0:01:14.28,Default,,0000,0000,0000,,by the body.
Dialogue: 0,0:01:17.31,0:01:19.56,Default,,0000,0000,0000,,The small intestine is lined with a
Dialogue: 0,0:01:19.56,0:01:22.31,Default,,0000,0000,0000,,heavily folded inter mucosa, and small
Dialogue: 0,0:01:22.31,0:01:24.81,Default,,0000,0000,0000,,finger-like projections called villi.
Dialogue: 0,0:01:25.75,0:01:28.70,Default,,0000,0000,0000,,The villi enable digested food to enter
Dialogue: 0,0:01:28.70,0:01:29.68,Default,,0000,0000,0000,,the blood stream.
Dialogue: 0,0:01:30.17,0:01:32.37,Default,,0000,0000,0000,,It is here in the small intestine
Dialogue: 0,0:01:32.37,0:01:35.67,Default,,0000,0000,0000,,where all nutrients and vitamins are absorbed.
Dialogue: 0,0:01:37.96,0:01:40.51,Default,,0000,0000,0000,,Chyme can travel through up to
Dialogue: 0,0:01:40.51,0:01:42.50,Default,,0000,0000,0000,,20 feet of small intestine
Dialogue: 0,0:01:42.50,0:01:45.78,Default,,0000,0000,0000,,before it passes through the ileocecal valve
Dialogue: 0,0:01:45.78,0:01:47.97,Default,,0000,0000,0000,,to enter the large intestine.
Dialogue: 0,0:01:48.24,0:01:50.69,Default,,0000,0000,0000,,Very little digestion occurs in the large
Dialogue: 0,0:01:50.69,0:01:51.47,Default,,0000,0000,0000,,intestine.
Dialogue: 0,0:01:52.28,0:01:54.62,Default,,0000,0000,0000,,Undigested chyme that enters the large
Dialogue: 0,0:01:54.62,0:01:56.61,Default,,0000,0000,0000,,intestine is considered waste.
Dialogue: 0,0:01:57.02,0:01:59.58,Default,,0000,0000,0000,,The waste becomes more and more solid
Dialogue: 0,0:01:59.58,0:02:02.06,Default,,0000,0000,0000,,as it passes through the large intestine
Dialogue: 0,0:02:02.06,0:02:04.80,Default,,0000,0000,0000,,because water is continuously being
Dialogue: 0,0:02:04.80,0:02:06.52,Default,,0000,0000,0000,,re-absorbed from the waste.
Dialogue: 0,0:02:07.80,0:02:10.90,Default,,0000,0000,0000,,Waste collects in the rectum, or
Dialogue: 0,0:02:10.90,0:02:13.16,Default,,0000,0000,0000,,end of the large intestine, until the brain
Dialogue: 0,0:02:13.16,0:02:16.04,Default,,0000,0000,0000,,signals for it to be expelled from the body.