Understanding Peristalsis and the Alimentary Canal

The video explains the role of the autonomic nervous system in controlling the alimentary canal's contractions, which move food through the digestive system. It describes the alimentary canal as a continuous tube comprising the oral cavity, stomach, and intestines. The process of peristalsis, involving rhythmic muscle contractions, is highlighted as essential for moving food along the digestive tract.

What does the autonomic nervous system control in the alimentary canal?

• Contractions that move food

• Voluntary muscle movements

• Blood circulation

• Sensory perception

Which parts are included in the alimentary canal?

• Heart and lungs

• Oral cavity, stomach, and intestines

• Kidneys and bladder

• Brain and spinal cord

What is the function of the smooth muscle layers in the alimentary canal?

• To perform peristalsis

• To absorb water

• To produce digestive enzymes

• To store nutrients

What is peristalsis?

• A nutrient absorption process

• A digestive hormone

• A rhythmic contraction and relaxation of muscles

• A type of enzyme

How does peristalsis move substances forward in the intestines?

• By chemical reactions

• By rhythmic wave-like patterns

• By creating a vacuum

• By gravity