Here's a breakdown:

* Hormones are produced by endocrine glands: These glands, like the thyroid, pancreas, and adrenal glands, release hormones directly into the surrounding interstitial fluid.

* Hormones enter the bloodstream: From the interstitial fluid, hormones diffuse into nearby capillaries and are carried throughout the body by the blood.

* Hormones reach target cells: The blood carries hormones to all parts of the body, but only specific cells, known as target cells, have receptors that can bind to and be affected by a particular hormone.

* Hormones exert their effects: Once a hormone binds to its receptor on a target cell, it triggers a cascade of events that lead to the desired physiological response.

So, the circulatory system acts as the transportation network for hormones, ensuring they reach their target cells and can exert their effects on the body.