glands

Pituitary Gland

Pituitary Gland The structure indicated is the pituitary gland. The pituitary gland is an endocrine gland located at the base of the brain, and lies within the sella turcica of the sphenoid bone, which is a saddle-shaped depression that encases and surrounds the pituitary gland­. The deepest part of the sella turcica is known as the hypophyseal fossa, anteriorly is the tuberculum sellae, and posteriorly is the dorsum sellae. The sella turcica itself is covered by a fold of dura known as the diaphragma sellae. The pituitary gland releases several hormones which are responsible for the control and regulation of …

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pituitary

Submandibular Gland

Submandibular Gland The structure indicated is the submandibular gland. There are three main large sets of salivary glands in the face: Parotid glands Submandibular glands Sublingual glands The submandibular glands are hook shaped and consist of a deep part and a superficial part, separated by the mylohyoid muscle. The deep part of the submandibular gland is formed from the shorter arm of the hook, which loops posteriorly around the mylohyoid muscle to enter the floor of the oral cavity. The superficial part of the submandibular gland is formed from the longer arm of the hook and lies outside the oral …

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Submandibular Gland

Posterior Pituitary

Posterior Pituitary The structure highlighted in purple is the posterior pituitary. The pituitary gland is a pea-sized endocrine gland located within the hypophyseal fossa of the sphenoid bone in the middle cranial fossa. The pituitary gland extends from the hypothalamus (highlighted in blue) and can be divided into: 1)      Anterior pituitary (highlighted in green) 2)      Posterior pituitary (highlighted in purple) The two parts of the pituitary have different embryological origins. The anterior pituitary develops from ectoderm from an area of the pharynx known as Rathke’s pouch, whereas the posterior pituitary arises from neuroectoderm, as an extension of the hypothalamus. The anterior pituitary …

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Posterior Pituitary