MICROSCAPE / SCIENCE PHOTO LIBRARY MICROSCAPE / SCIENCE PHOTO LIBRARY
Pituitary gland tissue. Transmission electron micrograph (TEM) of a section through tissue from the pituitary gland, showing a cluster of secretory cells of the anterior pituitary. There are five different cell types in the anterior pituitary, all of which synthesize and secrete a variety of peptide hormones that are released into the bloodstream. The pituitary gland is sometimes referred to as the 'master' endocrine gland because the hormones that it secretes regulate a wide range of organs and tissues located elsewhere in the body. Hormones are stored as cytoplasmic granules (round, white) in the cells. Magnification: x2000 when printed at 10 centimetres tall.
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