In anamniote (fishes and amphibians), a total of 10 pairs of cranial nerves are present, while it is 12 pair in amniote (reptiles, birds, mammal). The first 10 pairs are common for frog and rabbit. First 5 pair can be tabulated as Cranial nerve Number Functional Class Distribution Olfactory I Sensory Nose Optic II Sensory Retina of eye Oculomotor III Motor 4 eye ball (extra ocular muscles) Trochlear IV Motor Superior Oblique Muscle Trigeminal V Mixed (i) Ophthalmic (ii) Maxillary (iii)Mandibular Snout Upper jaw Lower jaw