Figure 5.

A) Internal wall of the left labyrinth from a young guinea pig showing the vestibule (microphotography, 55X magnification); B) Internal wall of the left labyrinth of a young-adult rat, showing the vestibule (microphotography, 60X magnification); C) Left membranous labyrinth of a young guinea pig (microphotography, 48X magnification); D) left membranous labyrinth from a young-adult rat (microphotography, 48X magnification). A and B) 1 - Saccule 2 - Cochlea C and D) 1 - posterior semicircular canal ampulla; 2 - superior semicircular canal ampulla; 3 - Lateral semicircular canal ampulla; 4 - Utricle; 5 - Lateral semicircular canal