GENERAL HISTOLOGY

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: -The hormones enter the general circulation. Eventually, they filter back to the capillaries elsewhere in the body. Unlike the red blood cells, hormones travel freely through the capillary walls. Though they travel everywhere in the body, hormones only influence specific target cells.

Detailed explanation-3: -Hormones are “cleared” from the plasma in several ways, including (1) metabolic destruction by the tissues, (2) binding with the tissues, (3) excretion by the liver into the bile, and (4) excretion by the kidneys into the urine.

Detailed explanation-4: -Endocrine glands release hormones (chemical messengers) into the bloodstream to be transported to various organs and tissues throughout the body. For instance, the pancreas secretes insulin, which allows the body to regulate levels of sugar in the blood.

Detailed explanation-5: -Hormones are transported primarily via the bloodstream throughout the body, where they bind to receptors on target cells, inducing a characteristic response.