Scientific Objections: Even on the purely biological plane there is a wide, unbridgeable chasm between man and beast, as illustrated by the following four considerations: 1  The human brain possesses qualities [G2, p. 115â130] that have no parallel in the animal world. One consequence is manâs explicit mental capabilities.
Olfactory System. The olfactory system is responsible for our sense of smell. This sense, also known as olfaction, is one of our five main senses and involves the detection and identification of molecules in the air. Once detected by sensory organs, nerve signals are sent to the brain where the signals are processed. Our sense of smell is closely linked our sense of taste as both rely on the perception of molecules. It is our sense of smell that allows us to detect the flavors in the foods we eat. Olfaction is one of our most powerful senses. Our sense of smell can ignite memories as well as influence our mood and behavior. Olfactory System Structures. Our sense of smell is a complex process that depends on sensory organs, nerves, and the brain. Structures of the olfactory system include:
When you detect a smell and sniff at it, you are increasing the number of scent molecules that will enter your nasal cavity and flow by the olfactory receptor cells on the roof of the nasal cavity, bathing them in sensory stimuli. The olfactory nerve will then send the stimuli to the olfactory center in the brain. This is a very direct route from the nose to the brain which helps us react quickly to the different smells that we detect. The brain will identify the smell and give a signal how to respond. Some responses are subconscious,