Description of pineal gland
Give a brief description of the term pineal gland?
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The pineal gland , also named as pineal body or epiphysis, is located centrally in head. It secretes the hormone melatonin, hormone produced at night and related to regulation of circadian rhythm (or circadian cycle, wakefulness-sleep cycle). Melatonin possibly controls many body functions related to night-day alternation.
SARS is a disease which appeared in the year 2003 with epidemic features in the province of Guangdong, in east China. What kind of agent causes the SARS?
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