A chatter can be explained by a cat's anatomy and the presence of
special glands on the roof of his mouth.
Sea turtles have
special glands in their eyes to help them rid their bodies of excess salt from ocean water.
The oil comes from
special glands lining the outer eyelids, the mucus comes from glands in the conjunctiva (the pink part inside the eyelids) and the water comes from tear (or «lacrimal») glands.
They have conquered these habitats through a variety of adaptations such as unusual photosynthetic pathways (crassulacean acid metabolism, CAM, and C4 as opposed to C3 photosynthesis), unusual morphologies (e.g., succulence), secretion of excessive salt
by special glands, and unusual methods of nutrient uptake (e.g., carnivory).
«Scratching is a marking behavior; it allows the deposition of scent
from special glands on the cat's paws,» he says.
They have
special glands in their paws (and elsewhere on the body) that release scent when the cat scratches or rubs against objects or people.
In chilies, however, capsaicin is found only in the fruit — secreted via
a special gland near the stem — and its production increases dramatically as the fruit ripens.
Montgomery glands are
special glands that lie just below the surface of your areola and may be seen as small bumps in the skin.
Whenever they spot Escovopsis, they secrete phenylacetic acid from
a special gland in their thoraxes, a strategy that kills the fungus and sets the ants apart from close relatives that cultivate bacteria and other microbes to fight off the fungi.
They secrete wax from
special glands, then chew it up and use it to form perfect hexagon shaped honey comb.
The third eyelid also contains
a special gland that produces a significant portion of the eye's protective tear film.