Question

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What is pineal gland?

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Answer 1

Answer:

endocrine gland in vertebrates

Explanation:

The shape of the gland resembles a pine cone from which it derived its name.[1] The pineal gland is located in the epithalamus, near the center of the brain, between the two hemispheres, tucked in a groove where the two halves of the thalamus join.The pineal gland is one of the neuroendocrine secretory circumventricular organs in which there does not exist the blood–brain barrier at the capillary level.

Nearly all vertebrate species possess a pineal gland. The most important exception is a primitive vertebrate, the hagfish. Even in the hagfish, however, there may be a "pineal equivalent" structure in the dorsal diencephalon.The lancelet Branchiostoma lanceolatum, the nearest existing relative to vertebrates, also lacks a recognizable pineal gland.The lamprey (another primitive vertebrate), however, does possess one.A few more developed vertebrates have lost pineal glands over the course of their evolution.

René Descartes believed the human pineal gland to be the "principal seat of the soul". Academic philosophy among his contemporaries considered the pineal gland as a neuroanatomical structure without special metaphysical qualities; science studied it as one endocrine gland among many.

Answer 2

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➡️The pineal gland, also known as the 'pineal body,' is a small endocrine gland. It is located on the back portion of the third cerebral ventricle of the brain, which is a fluid-filled space in the brain.The gland is named for its shape, which resembles a pinecone (in Latin, 'pinea').

➡️The pineal gland is a small, pea-shaped gland in the brain. Its function isn't fully understood. Researchers do know that it produces and regulates some hormones, including melatonin. Melatonin is best known for the role it plays in regulating sleep patterns.

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