Question

in humans, structures that release digestive secretions directly into the small intestine include both the

1. salivary glands and the pancreas
2. gall bladder and the lacteals
3. villi and the salivary glands
4. pancreas and the gall bladder

Explanation:

Salivary glands secrete into the mouth, not the small intestine. Lacteals absorb fats, not secrete digestive fluids. Villi are for absorption, not secretion. The pancreas releases pancreatic juice, and the gall bladder releases bile directly into the small intestine (duodenum). Thus, option 4 is correct.

Answer:

1. pancreas and the gall bladder