Question

Visceral mass is characteristic of

• A. Arthropods
• B. Molluscs
• C. Echinoderms
• D. All the above

Answer 1

Answer: (B)

Molluscs

The visceral hump, or visceral mass, of gastropods is always contained within the shell; it generally holds the bulk of the digestive, reproductive, excretory, and respiratory systems. A significant part of the visceral hump consists of the mantle, or pallial cavity. All mollusks have a visceral mass containing internal organs, including the digestive tract, paired kidneys, reproductive organs and a mantle that surrounds but does not cover entirely the visceral mass and secretes a shell (if one is present).

So, the correct answer is (C)