Human Digestive System Concepts

How much food does an average human consume over the course of a lifetime?

• Approximately 365 kg

• Between 1 and 2.7 kg

• More than 28,800 kg

• Over 10,000 kg

Which of the following statements accurately describes the human digestive system?

• It is comprised of 10 organs and contains over 20 specialized cell types.

• It is a simple system with only a few key organs.

• It is approximately 20 meters long.

• It primarily functions to store food for long periods.

What are the four main components of the digestive system?

• Mouth, esophagus, stomach, and intestines

• Gastrointestinal tract, accessory organs (pancreas, gallbladder, liver), regulatory elements (enzymes, hormones, nerves, blood), and mesentery

• Salivary glands, stomach, small intestine, and large intestine

• Brain, heart, lungs, and digestive tract

What is the moist lump of food formed in the mouth called, and what is the primary role of enzymes present in saliva?

• Chyme; they break down fats.

• Gastric juice; they break down proteins.

• Bile; they emulsify fats.

• Bolus; they break down starch.

What are the millions of tiny projections lining the small intestine that create a huge surface area for nutrient absorption called?

• Villi

• Cilia

• Microbes

• Pylorus