Which process is primarily responsible for moving food through the alimentary canal in humans?

• A. Peristalsis
• B. Active transport
• C. Osmosis
• D. Diffusion

Answer: (A)

Verified step by step guidance

1. Understand the alimentary canal: The alimentary canal is the digestive tract in humans, responsible for transporting and processing food. It includes organs such as the esophagus, stomach, intestines, and more.
2. Define peristalsis: Peristalsis is a series of wave-like muscle contractions that occur in the walls of the alimentary canal. These contractions help propel food forward through the digestive system.
3. Eliminate incorrect options: Active transport, osmosis, and diffusion are processes related to the movement of molecules across membranes, but they do not involve muscular contractions or the physical movement of food through the digestive tract.
4. Relate peristalsis to food movement: Peristalsis is the primary mechanism for moving food through the alimentary canal. It involves the coordinated contraction and relaxation of circular and longitudinal muscles in the canal walls.
5. Conclude the correct answer: Based on the definition and function of peristalsis, it is the process responsible for moving food through the alimentary canal in humans.