Structures in each arm of a sea star include the gonads,the system that works the tube feet,and
A)kidneys.
B)hearts of a circulatory system.
C)pyloric ceca that produce digestive fluids for extracellular digestion.
D)the intestine that collects large amounts of wastes to expel through the anus.
E)gills.

Question

Quizplus · Accepted Answer

Sea stars have a unique digestive system where their stomach can be everted out of their mouth to digest prey outside of their body. Pyloric ceca are important structures that produce digestive enzymes for this type of extracellular digestion.

Answer: A 
 The gonads in each arm of a sea star are responsible for producing gametes during the reproductive season. This is a key part of the sea star's life cycle.

Answer: B 
 Sea stars do not have a true circulatory system with a traditional heart, but they do have a water vascular system that helps them move and capture food. This system is responsible for the movement of their tube feet.

Answer: D 
 Sea stars do not have an intestine that collects large amounts of waste. They have a simple digestive system without many specialized organs.

Answer: E 
 Sea stars do not have gills, as they obtain oxygen and release carbon dioxide through their tube feet and papulae (small projections on their body surface).

Structures in Each Arm of a Sea Star Include the Gonads,the