What is the main function of mechanical digestion?

• To change the chemical composition of food

• To break down large pieces of food into smaller ones

• To use enzymes to break down food particles

• To absorb nutrients into the bloodstream

Which process uses enzymes to break down food particles?

• Mechanical digestion

• Chemical digestion

• Absorption

• Propulsion

What does the digestive system consist of?

• Only the alimentary canal

• Only accessory organs

• The alimentary canal and accessory organs

• Only the stomach and intestines

Which of the following is NOT a function of the digestive system?

• Ingestion

• Propulsion

• Photosynthesis

• Absorption

Which of the following is part of the alimentary canal?

• Salivary glands

• Liver

• Stomach

• Gallbladder

What is the primary function of accessory organs in the digestive system?

• To transport food

• To empty secretions into the alimentary canal

• To absorb nutrients

• To break down food mechanically

How long is the alimentary canal approximately?

• 5 meters

• 8 meters

• 10 meters

• 12 meters

Which of the following is NOT an accessory organ of the digestive system?

• Pancreas

• Esophagus

• Gallbladder

• Liver

What is the innermost layer of the alimentary canal wall?

• Submucosa

• Muscularis (externa)

• Mucosa

• Serosa

Which layer of the alimentary canal wall contains blood and lymphatic vessels, nerves, and glands?

• Mucosa

• Submucosa

• Muscularis (externa)

• Serosa