EVERYDAY SCIENCE

Detailed explanation-1: -Petrohyal muscles raise the hyoid and floor of buccal cavity of frog during respiration. The petrohyal muscle lie outside the mouth cavity and the upper and lower ends connect squamosal bone and hyoid respectively.

Detailed explanation-2: -Who makes the floor of the buccal cavity? The mylohyoid muscles construct the floor, which is mostly occupied by the tongue. The oral mucosa is a mucous membrane that covers the sides and under the surface of the tongue to the gums, as well as the inside part of the jaw (mandible).

Detailed explanation-3: -Movement of the hyoid is critical in tongue protrusion of frogs, and a biomechanical model of this action is presented. The hyoid appears to represent a compromise morphological system for three functions, rather than an optimal system for any one.

Detailed explanation-4: -On the contraction of the sternohyal muscles the floor of the buccal cavity along with hyoid is lowered increasing the volume of the buccal cavity. Thus, the air enters the cavity through the external nares.

Detailed explanation-5: -In order to draw air into its mouth the frog lowers the floor of its mouth, which causes the throat to expand.