The primary function of this vertebrate system is the maintenance and retention of water.Multiple choice question.RespiratoryCirculatoryUrinaryDigestive

Analyzing the Question

1. Understanding the Functions: The question asks about a vertebrate system that is primarily responsible for the maintenance and retention of water.

Relevant Concepts

2. Functions of the Systems:
   • Respiratory System: Primarily involved in gas exchange (oxygen and carbon dioxide).
   • Circulatory System: Transports nutrients, gases, hormones, and waste products throughout the body.
   • Urinary System: Responsible for the filtration of blood, the excretion of waste products, and the regulation of water and electrolyte balance.
   • Digestive System: Involved in the breakdown and absorption of food, indirectly related to water retention.

Analysis and Detail

3. Evaluating Each Option:
   • The Urinary System is directly responsible for the retention of water through the regulation of urine production and reabsorption in the kidneys. This includes processes that manage hydration levels in the body.
   • The other systems do not primarily focus on water retention.

Verify and Summarize

4. Conclusive Findings: Among all the options provided, the Urinary System is the correct system that fulfills the function of maintaining and retaining water in vertebrates.

Final Answer

The correct answer is Urinary.