The chemosensory system in reptiles is mediated by sensory cells in the nasal cavity and by [[Jacobsons organ|Jacobson's organ]] (vomeronasal organ) that is located in the roof of the mouth, caudal to the rostral scales and within the margins of the upper arcade. The tongues brings odoriferous particles to [[Jacobsons organ|Jacobson's organ]], which is innervated by the vomeronasal branch of the olfactory nerve. Receptors may also detect the presence of water. A chemosensory system analogous to taste exists in reptiles where taste buds and sensory papillae are spread throughout the oral mucosa. They are innervated primarily by the glossopharyngeal nerve (cranial nerve IX). | The chemosensory system in reptiles is mediated by sensory cells in the nasal cavity and by [[Jacobsons organ|Jacobson's organ]] (vomeronasal organ) that is located in the roof of the mouth, caudal to the rostral scales and within the margins of the upper arcade. The tongues brings odoriferous particles to [[Jacobsons organ|Jacobson's organ]], which is innervated by the vomeronasal branch of the olfactory nerve. Receptors may also detect the presence of water. A chemosensory system analogous to taste exists in reptiles where taste buds and sensory papillae are spread throughout the oral mucosa. They are innervated primarily by the glossopharyngeal nerve (cranial nerve IX). |