ANATOMY

Detailed explanation-1: -Your olfactory nerve is the first cranial nerve (CN I). This nerve enables your olfactory system and sense of smell. Many conditions can affect cranial nerve 1, including COVID-19, diabetes and Alzheimer’s.

Detailed explanation-2: -Each cell is connected to an olfactory neuron, or nerve cell. The cilia trap the inhaled odour molecules. The information on the molecules is transmitted to the olfactory neurons, then relayed via the nervous system to the brain, where the smell is processed and experienced.

Detailed explanation-3: -When taste receptor cells are stimulated, they send signals through three cranial nerves to taste regions in the brainstem-the facial, glossopharyngeal, and vagus nerves. These impulses get routed through the thalamus, which relays sensory information to other brain regions.

Detailed explanation-4: -Smell and taste are the oldest of the senses. They are essential for survival, having evolved to play key roles in such basic processes as feeding, mating, and avoiding danger. As the two chemical senses, they work by allowing tiny bits-molecules-of the outside world into the body, and binding to them.