Causes of Pale Skin, Pallor, Paleness, Grey Skin. Pallor, aka pale skin, paleness, grey skin, is the loss of color in comparison to your normal skin color. Pale skin is not a concern if your skin paleness is caused by a fair complexion or lack of sun exposure. However, paleness may be a health concern if your usual skin pigment goes grey.
The inside of your nose is lined with a moist, thin layer of tissue called a mucous membrane (say: MYOO-kus MEM-brayne). This membrane warms up the air and moistens it. The mucous membrane makes mucus, that sticky stuff in your nose you might call snot.
Smell and the Structure of the Nasal Cavity. Inside your nose is an open area called the nasal cavity. On the. roof of the nasal cavity are special sensory cells called olfactory. receptor cells. They extend through small holes in the bony roof. of the nasal cavity (the ethmoid bone of the skull). This sieve-like. structure is called the cribriform plate.