Openings for the rat to breath in and out.
Through their nostrils !
pump blood you a******
To help rats to breathe
The lung function of a rat is to take in oxygen you breath and take it to the blood. Then it releases the carbon dioxide from your body.
To nurse baby rats.
they provide heat
Its function is to take dust out of the air as it passes through your nostrils to the lungs. That's why it is sticky.
The whiskers indicate the width that rat can go when entering an opening, just like a cat or a lion.
Assuming you mean nostrils - they are the opening that leads to the lungs. As humans - we're supposed to inhale through our nose - as the tiny hairs in the nostrils trap dust etc before it reaches the lungs.
to pump blood around the rat's body
Assuming you mean nostrils - they are the opening that leads to the lungs. As humans - we're supposed to inhale through our nose - as the tiny hairs in the nostrils trap dust etc before it reaches the lungs.
The function of the trachea is the same in all terrestrial vertebrates. It provides an airway from the mouth to the bronchi.