Blood from the intestines travels to the liver via the:

Correct Answer: D

Rationale: The hepatic portal vein carries nutrient-rich blood from the intestines to the liver for processing before it enters systemic circulation.

Correct Answer: B

Rationale: In the intestinal phase, chyme is mixed with pancreatic juice and bile, and nutrients are absorbed primarily in the small intestine.

Correct Answer: C

Rationale: The vermilion zone's epithelium is thinner than the outer labial skin, not thicker, allowing the underlying vascularity to show through, giving it a red appearance.

Correct Answer: A

Rationale: Foliate papillae are located on the posterolateral sides of the tongue, not the tip, and are rudimentary in humans but prominent in rabbits.

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.