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A CT scan showing evidence of the nasal cycle: the more patent airway is on the right of the image, the swollen turbinates congesting the left. The nasal cycle is the subconscious [1] [2] alternating partial congestion and decongestion of the nasal cavities in humans and other animals. This results in greater airflow through one nostril with ...
The dog's footpad is a fatty tissue locomotive-supporting organ, present at the bottom of the four legs, consisting of digital pads, a metacarpal pad, and a carpal pad, with dewclaw near the footpad. [26] When a dog's footpad is exposed to the cold, heat loss is prevented by an adaptation of the blood system that recirculates heat back into the ...
In humans, the nasal cycle is the normal ultradian cycle of each nostril's blood vessels becoming engorged in swelling, then shrinking. The nostrils are separated by the septum. The septum can sometimes be deviated, causing one nostril to appear larger than the other. With extreme damage to the septum and columella, the two nostrils are no ...
Dog heads are of three basic shapes: [4] Apple-headed refers to a dog's head that is round on top, not flat. Brachycephalic, or shortened muzzled, sometimes so short that it can lead to breathing problems, such as in the Pug. Dish-faced refers to a dog whose nasal bone is higher at the nose than at the stop.
The functional vomeronasal system is found in all snakes and lizards, [22] and many mammals. Salamanders perform a nose-tapping behavior to presumably activate their VNO. [23] Snakes use this organ to sense prey, sticking their tongue out to gather scents and touching it to the opening of the organ when the tongue is retracted. [24]
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These hairs, called vibrissae, are thicker than body hair and effectively block larger particles from entering the respiratory tract. They also increase the surface area for particle deposition, improving the nose's ability to filter pathogens. [15] The cough reflex expels all irritants within the mucous membrane to the outside. The airways of ...
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