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Yes, if you breathe through your nose it will help in keeping the throat normal else breathing through the mouth makes it dry. It can be taken as a simple remedy for sore throat.
Breathing
A mudskipper is an amphibian fish. They are able to breathe through their skin as well as their mouth. They also have large gills that helps with breathing while out of water.
Breathing though your nose - allows the hairs in your nostrils to trap any dust particles. It also helps to warm the air as it travels to the lungs.
Pranayama is the regulation of the breath through certain techniques and exercises.• ORIGIN Sanskrit, from prāṇa 'breath' + āyāma 'restraint.'Meditation respirationPranayama is an essential breathing practice in Yoga that is given utmost importance; By practice you can regulate your breathing in a natural way as a newborn child does. However, the aim of Pranayama is to breath in and out as slow as possible consciously and continuously. Pranayama is a manner of breathing that helps to calm the spirit during meditation, like inhaling with the nose and exhaling through the mouth helps maintain breathing during strenuous exercises.
The lungs
diaphragm
Yes. Hard, fast breathing (often the result of cardio exercise) helps to increase lung capacity.
Breathing through your mouth means you take in more air at a time, if you're running it can be a good method for breathing. However, with breathing through one's mouth you don't get the filtration that's given by breathing through your nose, "nose hairs" cilia work as tiny filters to help keep gunk out of your lungs, the mucus housed in your nose also helps with this. I recommend breathing through your nose over your mouth, while your mouth takes in more air at a time, you're more likely to catch a cold or bacteria(or dust, spit, etc.) in your mouth than you are in your nose.
lungs
Diaphragm
it helps you to breath and to live of the oxygen once the breathing system takes in the oxygen and gives it to the heart