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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]
The ancient Greeks visualised the pineal gland as a sort of guard (valve), like the pylorus of stomach, that regulate the flow of pneuma (vital spirits) in the brain. Galen of Pergamum in the 2nd century CE was the first to make written record of the gland and argued against the prevailing concept.
The heliport is a private-use military facility operated by the Arizona Army National Guard. Pinal Airpark's primary function is to serve as a boneyard for civilian commercial aircraft, where the area's dry desert climate mitigates corrosion of the aircraft. It is the largest commercial aircraft storage and heavy maintenance facility in the ...
1.3.2 Pineal gland. 2 Cells derived from mesoderm. Toggle Cells derived from mesoderm subsection. 2.1 Paraxial mesoderm. 2.1.1 Mesenchymal stem cell.
This article was reviewed by Daniel Z. Lieberman, MD. Overview. You’re tossing and turning, counting sheep for what seems like forever, and still, sleep won’t come.
Move over, Wordle, Connections and Mini Crossword—there's a new NYT word game in town! The New York Times' recent game, "Strands," is becoming more and more popular as another daily activity ...
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]
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