The video introduces the digestive system, a long tube from mouth to anus, including accessory organs like the liver, pancreas, and gallbladder. It explains digestion's purpose: nutrient absorption, and types: mechanical (chewing, stomach churning) and chemical (enzymes, stomach acid, bile). The mouth's role in digestion is detailed, highlighting salivary glands and enzymes. The pharynx and esophagus are described, focusing on their function in food passage.

What is the primary function of the digestive system?

• To regulate body temperature

• To produce hormones

• To absorb nutrients from food

• To circulate blood throughout the body

Which of the following is NOT an accessory organ of digestion?

• Liver

• Pancreas

• Gallbladder

• Kidney

What is the main role of mechanical digestion?

• To break down food physically

• To secrete bile

• To absorb nutrients

• To produce enzymes

Which enzyme is responsible for breaking down starches into sugars in the mouth?

• Trypsin

• Salivary amylase

• Pepsin

• Lipase

Where are the submandibular glands located?

• Next to the pancreas

• Above the tongue

• Behind the liver

• Under the mandible

What is the function of the pharynx in the digestive system?

• To connect the mouth to the esophagus

• To store bile

• To produce saliva

• To secrete digestive enzymes

Which part of the digestive system is commonly referred to as the voice box?

• Esophagus

• Trachea

• Larynx

• Pharynx

What happens to the soft palate during swallowing?

• It contracts to push food down

• It swings up to close off the nasal cavity

• It secretes enzymes

• It absorbs nutrients

Which structure connects the nasal cavity and the mouth to the esophagus?

• Pharynx

• Larynx

• Gallbladder

• Trachea

What is the role of the esophagus in digestion?

• To absorb nutrients

• To produce bile

• To secrete digestive enzymes

• To transport food from the pharynx to the stomach