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:
Smelling and the Nose. We use our nose to smell things. At the top of the inside of our nose are millions of tiny little hairs called cilia. These hairs are connected to smell sensors which send signals to our brain about smell via the olfactory nerve. We smell things when they emit small molecules that float in the air and end up in our nose. We can't see these tiny molecules, but they are there.