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What is 1 + 3?
Each hair grows in an oblique epithelial tube called a __________.
The holocrine glands of the skin secrete __________.
Dead keratinized cells form the stratum __________ of the skin.
A deficiency of oxygen in the blood can give rise to a skin color called ______.
The fingernails are composed of the protein _________.
Perspiration creates a protective low-pH film on the skin called the ___________.
Sweat is expelled by contractions of the __________ cells in the base of the gland.
Axillary sweat glands are in a class called ________ glands after a former, mistaken belief about their mode of secretion.
Earwax is also called _________.
Hair of the eyebrows
Thinning of the hair
A yellow pigment sometimes found in the skin.
Principal protein of the stratum corneum.
Principal protein of the fingernails