Digestive
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Definitions of Key Terms in Digestion
Alimentary Canal: A continuous tube that processes food, starting from the mouth and ending at the anus.
Lumen: The interior space of the alimentary canal where food passes.
Propulsion: The movement of food through the digestive tract, primarily by peristalsis.
Peristalsis: Wave-like muscle contractions that move food along the digestive tract.
Segmentation: Rhythmic contractions that mix food and enhance nutrient absorption.
Mastication: The mechanical process of chewing food into smaller pieces.
Chemical Digestion: The breakdown of food into absorbable units through enzymes.
Salivary Amylase: An enzyme in saliva that begins the digestion of carbohydrates.
Pancreatic Amylase: An enzyme produced by the pancreas that continues the breakdown of carbohydrates in the small intestine.
Lipases: Enzymes that digest fats.
Pepsin: An enzyme that breaks down proteins in the stomach.
Trypsin: A pancreatic enzyme that continues protein digestion in the small intestine.
Lactase: An enzyme that breaks down lactose, a sugar found in milk.
Maltase: An enzyme that converts maltose into glucose.
Sucrase: An enzyme that breaks down sucrose into glucose and fructose.
Dipeptidases: Enzymes that break down dipeptides into amino acids.
Mucosa: The innermost layer of the alimentary canal involved in secretion and absorption.
Submucosa: A layer containing blood vessels, nerves, and connective tissue.
Muscularis Externa: A layer responsible for peristalsis and mixing food.
Serosa: The outermost protective layer of the alimentary canal.
Villi: Small, finger-like projections in the small intestine that increase surface area for absorption.
Microvilli: Even smaller projections on villi that further increase the surface area for absorption.
Bile Salts: Compounds that assist in the emulsification of fats.
Chylomicron: A lipoprotein particle that transports dietary lipids through the lymphatic system.
Entroendocrine Cells: Cells that secrete hormones and other substances to regulate digestion.
Definitions of Key Terms in Digestion
Alimentary Canal: A continuous tube that processes food, starting from the mouth and ending at the anus.
Lumen: The interior space of the alimentary canal where food passes.
Propulsion: The movement of food through the digestive tract, primarily by peristalsis.
Peristalsis: Wave-like muscle contractions that move food along the digestive tract.
Segmentation: Rhythmic contractions that mix food and enhance nutrient absorption.
Mastication: The mechanical process of chewing food into smaller pieces.
Chemical Digestion: The breakdown of food into absorbable units through enzymes.
Salivary Amylase: An enzyme in saliva that begins the digestion of carbohydrates.
Pancreatic Amylase: An enzyme produced by the pancreas that continues the breakdown of carbohydrates in the small intestine.
Lipases: Enzymes that digest fats.
Pepsin: An enzyme that breaks down proteins in the stomach.
Trypsin: A pancreatic enzyme that continues protein digestion in the small intestine.
Lactase: An enzyme that breaks down lactose, a sugar found in milk.
Maltase: An enzyme that converts maltose into glucose.
Sucrase: An enzyme that breaks down sucrose into glucose and fructose.
Dipeptidases: Enzymes that break down dipeptides into amino acids.
Mucosa: The innermost layer of the alimentary canal involved in secretion and absorption.
Submucosa: A layer containing blood vessels, nerves, and connective tissue.
Muscularis Externa: A layer responsible for peristalsis and mixing food.
Serosa: The outermost protective layer of the alimentary canal.
Villi: Small, finger-like projections in the small intestine that increase surface area for absorption.
Microvilli: Even smaller projections on villi that further increase the surface area for absorption.
Bile Salts: Compounds that assist in the emulsification of fats.
Chylomicron: A lipoprotein particle that transports dietary lipids through the lymphatic system.
Entroendocrine Cells: Cells that secrete hormones and other substances to regulate digestion.