A chemical process for reducing the number of disease-causing germs on cleaned surfaces to a safe level
sanitizing
Muscular, cone-shaped organ that keeps the blood moving within the circulatory system
heart
Outermost and thinnest layer of the skin
epidermis
Part of the nail plate that extends over the tip of the finger or toe
free edge
Tuft of hair that stands straight up
cowlick
The ability of the body to destroy and resist infection
immunity
A cell part that encloses the protoplasm and permits soluble substances to enter and leave the cell
cell membrane
Fibrous protein that gives the skin form and strength
collagen
When the nail is abnormal in shape or form
nail malformation
Hair that forms in a circular pattern on the crown of the head
whorl
Virus that causes acquired immune deficiency syndrome (AIDS)
HIV
The body system that consists of the skin and its accessory organs
integumentary system
They excrete perspiration and detoxify the body by excreting excess salt and unwanted chemicals
sweat glands
The whitish, half-moon shape at the base of the nail
lunula
The part of the hair located below the surface of the epidermis
hair root
The process that completely destroys all microbial life, including spores
sterilization
Bones that form the sides and top of the cranium
parietal bones
A fatty or oily secretion that lubricates the skin and preserves the softness of the hair
sebum
Hardened keratin plate that sits on and covers the natural nail bed
nail plate
Thickness or diameter of the individual hair strand
hair texture
Round-shaped bacteria that appear alone or in groups
cocci
Automatic reaction to a stimulus that involves the movement of an impulse from a sensory receptor along the sensory nerve to the spinal cord
reflex
Fibrous protein of cells that is also the principal componenet of hair and nails
keratin
Living skin at the base of the natural nail plate that covers the matrix area
eponychium
Abnormal hair loss
alopecia