A gland in the brain known as the pineal gland produces the hormone melatonin when the body is exposed to light - sunlight or artificial light.
The pineal gland or pineal body is a small gland in the middle of the head.
Other distinct anatomic structures such as the pineal gland and third ventricle could not be identified due to autolysis.
Melatonin is a hormone produced by the pineal gland , a small organ deep in the mammalian brain that conveys information to the rest of the brain and body about the length of light-dark cycles.
This diurnal variation in melatonin synthesis is brought about by norepinephrine secreted by the postganglionic sympathetic nerves that innervate the pineal gland .
Melatonin is a hormone that is naturally secreted in the evening from the pineal gland in the brain and tells the brain it is time to sleep.
The major glands that make up the human endocrine system are the hypothalamus, pituitary, thyroid, parathyroids, adrenals, pineal body , and the reproductive glands, which include the ovaries and testes.
The 24-hour circadian rhythm of light - dark (day-night) cycle is controlled by the hypothalamus through a neural pathway to the pineal gland .
These are extremely rare benign tumours which develop from the pineal gland situated between the two halves of the brain (cerebral hemispheres).
Secreted nightly by the pineal gland , the hormone alerts birds, lizards, and mammals to approaching mating seasons and helps them keep track of hibernation deadlines.