MICROANATOMY

Detailed explanation-1: -Endocrine glands make chemicals called hormones and pass them straight into the bloodstream. Hormones can be thought of as chemical messages. From the blood stream, the hormones communicate with the body by heading towards their target cell to bring about a particular change or effect to that cell.

Detailed explanation-2: -Lipid-soluble hormones diffuse out across the membranes of endocrine cells and travel in the bloodstream bound to transport proteins.

Detailed explanation-3: -About Hormones Endocrine hormones are secreted within the tissue (rather than via a duct) and enter the blood stream via capillaries.

Detailed explanation-4: -Hormones may also be removed from the bloodstream by enzymatic activities present in the liver, or through excretion by the kidneys. Water-soluble hormones are usually the easiet to remove, and most often disappear from the bloodstream in a few hours.

Detailed explanation-5: -Once within the circulatory system a small proportion of hormones circulate freely, however the majority are bound with a transport protein. Mainly produced in the liver, these transport proteins are hormone specific, such as the sex hormone binding globulin that binds with the sex hormones.