Questions: Blood does not do which of the following? Transports nutrients Regulates body temperature Maintains fluid volume Secrete hormones

The answer is the fourth one: Secrete hormones.

Explanation for each option:

1. Transports nutrients: Blood is responsible for transporting nutrients from the digestive system to cells throughout the body. This is a primary function of blood, making this option incorrect in the context of the question.

2. Regulates body temperature: Blood helps regulate body temperature by distributing heat throughout the body and adjusting blood flow to the skin. This is another function of blood, so this option is also incorrect.

3. Maintains fluid volume: Blood plays a role in maintaining fluid volume through the balance of water and electrolytes, as well as through the osmotic pressure exerted by plasma proteins. This is a function of blood, making this option incorrect.

4. Secrete hormones: Blood does not secrete hormones. Hormones are secreted by glands in the endocrine system and then transported by the blood to target organs and tissues. Therefore, this option is correct as it describes something blood does not do.

In summary, blood does not secrete hormones; it transports them after they are secreted by endocrine glands.