Description Of The Pituitary Gland And Its Function

770 WordsSep 2, 20144 Pages
Figure 4: Hypothalamic and anterior pituitary glands (right) Description of the pituitary gland and its function Use both the flat and 3D models to visualize the following characteristics of the pituitary and its location Morphology mechanisms A tiny-almond sized organ The pituitary gland is composed of three lobes: Anterior, intermediate (smallest) and posterior (see the figure on the right) Anterior pituitary (AP): Hormones (up regulation and down regulation) are controlled by the hypothalamic hormones. The AP is divided into three parts or pars: the pars tuberalis, pars intermedia and pars distalis. The posterior pituitary develops as an extension of the hypothalamus and its cells (known as the magno-cellular neuro-secretory cells have its cell bodies in the hypothalamus and its axons projecting into the posterior pituitary. The anterior pituitary (adenohypophysis) arises from the oral ectoderm while the posterior pituitary (neurohypophysis) originates from the neuro-ectoderm. The following diagram shows the location and histology of pituitary gland Figure 5: the location of the pituitary gland (upper left) and its anatomy (upper right). The middle is a schematic drawing of the pituitary and the lower (from left to right) are: histology of the anterior pituitary, the pituitary histology, pars nervosa and distals and at far right is a section in the posterior pituitary. You should be able to: Draw a schematic drawing of the pituitary gland both location and its

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