Olfactory bulb
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The olfactory bulb is a neural structure in the forebrain of vertebrates that is involved in olfaction, or the sense of smell. It transmits olfactory information to the other brain regions including t
Human brain seen from below. Vesalius' Fabrica, 1543. Olfactory bulbs and olfactory tracts are the two protruding structures labeled "F".
Coronal image of mouse main olfactory bulb cell nuclei. Blue – Glomerular layer; Red – External Plexiform and Mitral cell layer; Green – Internal Plexiform and Granule cell layer. Top of image is dorsal aspect, right of image is lateral aspect. Scale, ventral to dorsal, is approximately 2mm.
Fossil endocast of a Tyrannosaurus cranial vault, showing extensive olfactory bulb (structure to the left). Tyrannosaur dinosaurs, as well as carnivorous animals in general, have highly developed olfactory bulbs to seek out prey.
Sense of smell
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The sense of smell, or olfaction, is the special sense through which smells are perceived. The sense of smell has many functions, including detecting desirable foods, hazards, and pheromones, and play
Painting of a woman smelling a carnation. Olfaction uses chemoreceptors that create signals processed in the brain that form the sense of smell.
The Lady and the Unicorn, a Flemish tapestry depicting the sense of smell, 1484–1500. Musée national du Moyen Âge, Paris.