About esophagus, all are true EXCEPT:

Correct Answer: C

Rationale: The muscularis externa of the esophagus transitions from skeletal muscle (upper third) to smooth muscle (lower third), not entirely smooth muscle.

Correct Answer: B

Rationale: Pyloric glands have deeper pits (about half the mucosal thickness) compared to the shorter pits of fundic glands.

Correct Answer: A

Rationale: Parotid acini produce saliva, which begins carbohydrate digestion, not lipid digestion; hepatocytes and pancreatic acini produce bile and lipase for lipids.

Correct Answer: C

Rationale: The space of Disse contains plasma and microvilli, not red blood cells, which remain in the sinusoidal lumen.

Correct Answer: A

Rationale: Haustra are the small pouches formed by the constrictions of the colon wall, aiding in the mixing and absorption process.