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Biology 20 flashcards ~10 min

Human Digestive System

The human digestive system is responsible for breaking down food into nutrients that the body can absorb and use for energy, growth, and repair. It consists of a series of organs that work together to mechanically and chemically digest food, absorb essential n...

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The human digestive system is responsible for breaking down food into nutrients that the body can absorb and use for energy, growth, and repair. It consists of a series of organs that work together to mechanically and chemically digest food, absorb essential nutrients, and eliminate waste. Understanding how the digestive system functions is fundamental to learning human anatomy, physiology, and overall health.

This flashcard deck covers the essential concepts of the human digestive system, including the functions of the mouth, esophagus, stomach, small intestine, large intestine, rectum, and anus. It also explores the roles of accessory digestive organs such as the salivary glands, liver, gallbladder, and pancreas, along with important digestive processes like peristalsis, enzyme activity, bile production, nutrient absorption, and waste elimination. These topics provide a comprehensive overview of how food is processed from ingestion to excretion.

Designed for biology students, healthcare learners, and anyone studying human anatomy, these flashcards present key concepts in a simple question-and-answer format that supports active learning and long-term retention. Whether you are preparing for biology exams, reviewing classroom material, or strengthening your understanding of the digestive system, this deck offers an effective way to master the structure and function of the human digestive tract.

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The digestive system breaks down food, absorbs nutrients, and eliminates undigested waste.
Digestion begins in the mouth.
Teeth mechanically break food into smaller pieces through chewing.
Saliva moistens food and contains enzymes that begin the digestion of carbohydrates.
The esophagus transports food from the mouth to the stomach through peristalsis.
Peristalsis is the series of wave-like muscle contractions that move food through the digestive tract.
The stomach stores food, mixes it with digestive juices, and begins protein digestion.
The liver produces bile.
Bile helps digest fats by breaking them into smaller droplets.
The gallbladder stores and concentrates bile.
The pancreas releases digestive enzymes and bicarbonate into the small intestine.
The small intestine.
Villi and microvilli increase the surface area for nutrient absorption.
The large intestine absorbs water and forms feces.
The rectum stores feces until elimination.
The anus controls the elimination of feces from the body.
Accessory digestive organs assist digestion but food does not pass through them.
The salivary glands, liver, gallbladder, and pancreas.
Nutrient absorption provides the body with energy and the materials needed for growth, repair, and normal body functions.
To convert food into absorbable nutrients and eliminate indigestible waste from the body.