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The Journey Inside
Transcript of The Journey Inside
Here, the tongue and 32 teeth help to chew food and break it into smaller pieces, which is called mechanical digestion The salivary glands (parotid, submandibular, and sublingual) also help to break down food in the mouth by producing enzymes
Amylase is produced by the glands and helps to digest starch into smaller molecules
This enzyme helps break down the bun, which is composed of carbohydrates
This is called chemical digestion- the process in which chemicals or enzymes break down food in the body After being chewed and swallowed, the food enters the pharynx- the first bit of tubing the food passes through after it leaves the mouth.
The epiglottis is a flap of cartilage that prevents food from going down the larynx and into the lungs.
From here, it enter the esophagus- a long tube that runs from the mouth to the stomach.
It uses rhythmic, wave-like muscle movements (called peristalsis) to force food from the throat into the stomach. The Mouth Once in the stomach, the burger mechanically and chemically digests even further
Mechanical: the stomach contracts and mixes food to break it down further
Chemical: The enzyme pepsin helps break down proteins such as the hamburger meat
The process of absorption into the blood stream also begins here The Small Intestine Salivary Glands 1. Duodenum- more chemical digestion
The enzyme, amylase, breaks down carbohydrates
Trypsin breaks down more proteins
Lipase begins the breakdown of lipids (fats)- this would be the cheese and meat on the burger
Carbs and proteins that were previously broken down are absorbed into the blood stream for various cell functions
Fats are absorbed into the blood stream here because the lining has bigger pores Pancreas Pumps out juice that neutralizes stomach acid in the small intestine
Lipase The Liver Bile is produced here but is stored in the gallbladder and sent to the Duodenum through a duct to neutralize stomach acid
Bile emulsifies fats (separates it into small droplets) so they can mix with water and be acted upon by enzymes. The parts of the food that can’t be digested get pushed into the large intestine, also called the colon
Its function is to move the waste from the small intestine on to the rectum and it does this through propulsion
The absorption of water takes place while it moves to the rectum Propulsion, or involuntary muscle movements, move food through the small intestine The Rectum The lowermost segment of the large intestine
It stores the firm waste until you are ready to get rid of it by defecation
Feces exits the body through an opening at the end of the digestive system called the anus After thinking about all this, Ronald takes a big bite! The End!