Answer: villi.
- A villi
- B cilia
- C nephrons
- D alveoli
Correct answer: A. villi
Explanation: Villi greatly increase the surface area for absorption.
The human digestive system. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.
Concept context
The digestive tract, digestive enzymes, hormonal control of digestion, and liver function. High NEET weightage.