If you turned a frog egg upside down, you would expect it to reorient relative to gravity because the dense yolk granules concentrated in the vegetal hemisphere of the egg respond to gravity.
The frog egg is very large as compared to the normal egg cell. It is unevenly distributed with a top dark colored pole called animal pole and a light yolky pole called a vegetal pole.
The vegetal pole is concentrated with the yolk that is present for providing the nourishment to the growing embryo. The animal pole is the one from where the sperm enters and the development of embryo take place.
As the vegetal pole is denser as compared to animal pole so it will respond to the gravity and reorient along the direction of gravity.
During swallowing, the pharynx changes from airway to a food channel channel.During mastication, the food bolus aggregates in the pharynx before swallow commencement.
<em>The structures in the oral pit, pharynx and larynx serve various capacities in breathing, talking, rumination and swallowing,
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The nasal cavity, The pharynx is the piece of the throat behind the mouth and larynx the cylinders going down to the lungs and stomach .
Nourishment and fluid pass in reverse into the throat on their way to the stomach. Air pass out through the larynx and into the trachea.
