In Both Tunicates and Cephalochordates,the Ventral Side of the Pharynx

question 14

Short Answer

In both tunicates and cephalochordates,the ventral side of the pharynx contains a ciliated,mucus-secreting groove,the ____________.

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Definitions:

Circadian Clock

An internal biological clock regulating the sleep-wake cycle and other physiological processes on roughly a 24-hour cycle.

Internal Clock

An innate mechanism that regulates physiological and behavioral functions in a roughly 24-hour cycle, also known as the circadian rhythm.

Pineal Gland

A small endocrine gland in the brain, secreting melatonin and involved in regulating sleep patterns.

Thyroid Gland

The endocrine gland that produces thyroxine and regulates metabolism.