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Title: The Digestive System
Description: Simple and descriptive notes about the human digestive system, the organs that are in it, and their respective functions.
Description: Simple and descriptive notes about the human digestive system, the organs that are in it, and their respective functions.
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The Digestive System
Types of digestion
●
●
●
Intracellular: it happens inside the cell
...
(ex: fungi)
Extracellular: it happens outside the cell but inside the body
...
The human digestive system
● Mouth and mouth
cavity: where mechanical
digestion occurs and starch
digestion begins through the
enzyme salivary amylase
(ptyalin)
...
● Pharynx: a tube common
to the respiratory and digestive
systems
...
● Esophagus: where the
peristaltic movements, which are involuntary contractions of the esophageal walls, begin,
leading the food to the stomach
...
The acid protects the body from pathogens in food and activates the enzyme pepsin,
which digests proteins
...
It is divided into duodenum and jejunum ileum
...
Pancreatic juice (produced by the pancreas), is formed by sodium bicarbonate (makes PH
basic), pancreatic amylase (digestion of starch), pancreatic lipase (digestion of lipids),
trypsin and chymotrypsin (digestion of proteins), and n uclease (digestion nucleic acids)
...
Enteric juice (produced by the duodenum) is formed by enteric lipase (digestion of lipids),
disaccharidase ( digestion of sugars), and dipeptidase (digestion of proteins)
...
Bile (produced in the liver and stored in the gallbladder) is formed by salts and bile acids that
emulsify lipids, facilitating their digestion
...
➔ Jejunum-ileum: it has folds and microvilli
...
Water-soluble substances are absorbed by the blood and fat-soluble substances are
absorbed by the lymphatic circulation
...
Title: The Digestive System
Description: Simple and descriptive notes about the human digestive system, the organs that are in it, and their respective functions.
Description: Simple and descriptive notes about the human digestive system, the organs that are in it, and their respective functions.