I am stuck on a question on The Integumentary System, the question is

Water molecules in the blood pass through the walls of the (blank) into the sweat glands.
I am not sure, can someone help me, thanks.

what is the acceleration of an object in the direction of motion

Of course, I'd be happy to help you with that question!

In order to answer this question, we need to understand the functions and structures of the integumentary system. The integumentary system consists of the skin, hair, nails, and associated glands.

In this case, we are specifically looking at the sweat glands. Sweat glands are responsible for producing sweat, which helps regulate body temperature and excrete waste products. Sweat is primarily composed of water, electrolytes, and some waste compounds.

Water molecules in the blood pass through the walls of the sweat glands to become part of the sweat. To identify the structure through which these water molecules pass, we need to recall the anatomy of the sweat gland.

Sweat glands are made up of two distinct types: apocrine and eccrine glands. However, in this question, we are referring to the general structure of sweat glands. These glands are typically located in the deeper layer of the skin, known as the dermis.

As water molecules in the blood pass into the sweat glands, they must cross the walls of tiny blood vessels called capillaries. Capillaries are the smallest blood vessels and are present in various organs and tissues, including the dermis.

Therefore, the correct answer to your question is that water molecules in the blood pass through the walls of the capillaries into the sweat glands.

I hope this explanation helps you understand the answer to your question! Let me know if you have any more inquiries or if there's anything else I can assist you with.