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.
The body of a tooth is made of dentin with the crown covered by enamel, one of the hardest substances produced in nature. Inside the tooth, is a soft tissue called the pulp containing blood vessels, nerves and connective tissue, which creates the surrounding dentin and enamel during growth and development. The pulp extends from the crown of the tooth to the tip of the roots where it connects to the tissues surrounding the root.