During Organogenesis,the First Organ System to Begin Forming in Animal

question 19

Multiple Choice

During organogenesis,the first organ system to begin forming in animal embryos is

• A)the digestive system.
• B)the nervous system.
• C)the endocrine system.
• D)the circulatory system.
• E)the excretory system.

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Definitions:

Epoch

A significant period in history or a person's life, often marked by notable events or characteristics.

Zeitgebers

Environmental cues, such as light and temperature, that regulate the biological clock and rhythmic physiological or behavioral events.

Rhythmicity

The quality or state of being rhythmic, especially the regular recurrence of physiological processes or behaviors in an organism.

Entrainers

External cues or agents that synchronize biological rhythms to the environment, such as light influencing circadian rhythms.