It is another source of air, the hair found in our nostrils will clean the air before it enters into our diaphragm.
They use their nostrils for breathing. It is especially important to allow them to breathe while they are swallowing prey items.
Breathing
The openings to the nostrils are call the naries. The singular is a naris.
No, we do not breathe out of both nostrils simultaneously. Our breathing alternates between the two nostrils throughout the day in a cycle called the nasal cycle.
Well, honey, perch nostrils are located on their snouts and are used for breathing and detecting odors in water, while human nostrils are located on our faces and are used for breathing and smelling the delicious aroma of freshly baked cookies. So, in a nutshell, perch use their nostrils to navigate the waters, while we use ours to navigate the scent of a good meal.
Breathing. Inhaling oxygenated air through our nostrils.
The two breathing openings in the nose are "nostrils."
Both, breathing through your nostrils act as a vent-like mechanism filtering out pollution from the air, and breathing through your mouth fulfills your lungs with the right amount of oxygen it needs.
A horse will flare his/her nostrils when breathing hard or fast. This may be after running or other exercise, or when the horse is in pain. When it is frightened. it will flare its nostrils to take in potentially informative smells.
Because they are not actually nostrils nor used for breathing. The two holes on the front of the shark are used for sensing smells, but not for breathing. While the shark swims, water flows through the "nostrils" and along the nasal passage. Inside the nasal passage are folds of skin which are covered in very sensitve sensory cells. These cells enable to shark to "smell" things. For example, a shark can "smell" blood through the water passing into its nostrils, pinpoint the source of the blood and hunt the prey. So, the nostrils are used for "smelling", not breathing.
The Nare is a nostril, a frogs nostrils or breathing holes above his mouth.
All birds have lungs for breathing, as mammals and other animals.