Question

In frogs, muscles which help in respiration are

• A. Sternum and petrohyal
• B. Sternohyal and petrohyal
• C. Jugal and tendons
• D. None of the above

Answer 1

Answer: (B)

Sternohyal and petrohyal

Ventilation of lungs in frogs is affected by oscillatory or lowering and raising of bucco-pharyngeal cavity. This oscillatory movement of bucco-pharyngeal cavity is brought about by two sets of muscles: sternohyoid (sternohyal) muscles which is attached anteriorly to the lower surfaces of hyoid bone and posteriorly to sternum bone and petrohyoid (petrohyal) muscles attached anteriorly to squamosal bone and posteriorly to upper surfaces of hyoid bone.

Hence the correct option is B.