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An abundance of cilia and centrioles has also been found in these Type 2 cells of the pineal gland. [7] Unique to the Type 2 is the presence of vacuoles containing 2 layers of membrane. [7] As Type 1 cells contain serotonin, Type 2 cells contain melatonin and are thought to have similar characteristics as endocrine and neuronal cells. [8]
The pineal gland (also known as the pineal body [1] or epiphysis cerebri) is a small endocrine gland in the brain of most vertebrates. It produces melatonin, a serotonin-derived hormone, which modulates sleep patterns following the diurnal cycles. [2] The shape of the gland resembles a pine cone, which gives it its name. [3]
Pineal gland. Pinealocyte; Cells derived from mesoderm Mesoderm ... Thyroid gland Follicular cell; Parafollicular cell [3] Parathyroid gland. Parathyroid chief cell;
The pineal gland is located in the diencephalon of the brain. It primarily releases melatonin , which influences daily rhythms and may have an antigonadotropic effect in humans. [ citation needed ] It may also influence the melanotropes and melanocytes located in the skin.
There are many types of cells that make up the endocrine system and these cells typically make up larger tissues and organs that function within and outside of the endocrine system. Hypothalamus; Anterior pituitary gland; Pineal gland; Posterior pituitary gland. The posterior pituitary gland is a section of the pituitary gland.
The pineal gland thereby was established as an endocrine gland. As it controls other the important endocrine glands, including the so-called "master gland", the pituitary gland, it is more appropriate to refer the pineal gland as the true "master gland" of the body. [5] [6] [7]
The pineal gland is attached to the brain in this region. [7] The medial habenula (MHb) receives connections from posterior septum pellucidum and diagonal band of Broca; the lateral habenula receives afferents from the lateral hypothalamus, nucleus accumbens, internal globus pallidus, ventral pallidum, and diagonal band of Broca. [8]
Papillary Tumors of the Pineal Region are located on the pineal gland which is located in the center of the brain. The pineal gland is located on roof of the diencephalon. It is a cone-shaped structure dorsal to the midbrain tectum. [3] The tumor appears to be derived from the specialized ependymal cells of the subcommissural organ.