Body Organs

In vertebrates nose have function to expel air for respiration in conjunction with mouth. As like human, behind nose are olfactory mucosa and sinuses . Behind the nasal cavity, air will passes through pharynx, shared with digestive system, then air into the rest of respiratory system. As like in human vertebrates’ nose also have similar function like inhale air from the atmosphere and take oxygen after passes the lung then release carbon dioxide. In vertebrates nose also have inner hairs whose functions to stop unwanted particles from entering the lungs . In wet nose like dogs is useful for the perception of direction. Sensitive to cold receptors in the skin detect the place where the nose is cooled the most and this is the direction a particular smell that the animal just picked up comes from. The sensitive of smell on Dog nose is better than other normal animals. Different in reptiles, nose have function to sense of heat that can predict the distance of other animal. The nasa...

The nose, the site of the sense of smell is the organ through which mammals take in air. It is supported by cartilage and bone, covered with skin , lined with a mucous membrane, and provided with muscle. A nasal septum divides it into passages, each of which begins with a vestibule and contains a respiratory and olfactory region. The lining of the vestibule is continuous with the skin and contains hairs, sweat glands, and sebaceous (oil producing) glands . The respiratory region includes nearly all of the septum and the lateral walls of the nose. Goblet cells, which produce and secrete a watery mucus, are present in the lining, as is a type of erective tissue, composed of large, thin-walled veins whose blood supply serves to warm incoming air. The olfactory region is located on the superior concha and adjacent septum. Olfactory cells are present in its lining and have delicate, slender process (modified cilia) at their free surface. Odors from chemicals in the air are received by ...