Dogs have heightened senses and can often hear and smell things that a human cannot. For this reason, dogs are often used to detect particular odors. For example, at airports, dogs are used to sniff for bombs and drugs The dogs help keep people safe so that nothing harmful gets on a plane. Dogs are also often sent on search parties to find people who are missing. They will smell a shirt that has the scent of a person on it. Then they will search for a similar scent. When they get on the trail of a scent, dogs will follow it with their nose until they find the missing person. Engineers are working to design an artificial, or human-made, nose that can act like a dog nose. They have analyzed the way a dog detects a scent and have begun to mimic it in their designs. Apply If VOu bad a keen sense of smelL like that of a dog what do vOu think
Anatomy and Physiology of Special Sensory Organs
Sensory organs can be labeled as special sensory structures that permit sight, hearing, odor, and flavor. Sensory structures permitting proprioception, touch, thermal, and pain perception can be classified as more advanced sensory organs. The sensory neurons are trained to find out modifications in the external and internal conditions so that a person's body can react to that change. A stimulus is the first signal that is recognized by any sensory receptor of the body. Stimulus is an impulse generated when there is a change in the surroundings of a person. For example, a heated environment will alert the brain through the thermal sensory organs and generate a reflex accordingly.
Sensory Receptors
The human sensory system is one of the most complex and highly evolved structures, which processes a myriad of incoming messages. This well-coordinated system helps an organism or individual to respond to external stimuli, appropriately. The sensory receptors are an important part of the sensory system. These receptors are specialized epidermal cells that respond to external environmental stimuli. These receptors consist of structural and support cells that form the peripheral unit of the receptor and the neural dendrites which receive and detect the external stimuli.
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