The largest organ system in the body is

Most characteristics of skin are

Skin receives about ____ of the body's blood.

Which are the main layers of skin

A third base fat layer is called the

The epidermal layer where mitosis occurs is

The protein added to hair cells is called

The epidermal layer only found in thick skin areas is

The cells in the stratum spinosum are held together by

Keratinocytes (skin cells ) ______________ as they are being made.

_________________________ are spider-looking cells in the stratum basale of the epidermis that are responsible for skin tone, moles, and tanning.

Oval cells in the stratum basale that make contact with sensory nerves and are responsible for light touch sensation are called

True or false: The dermis is located below the epidermis.

The dermal layer contains the following layers:

The deepest layer under the dermis is the

_____________ insulates mammals, helps with body temperature regulation, and aids with touch sensitivity.

Hair follicles are found al lover the body except on the __________ and ___________

Which part of a hair shaft has flat fibers formed from cells that have granules of pigments that give hair color?

Hair is attached by

The muscle attached to the hair follicle that contracts when you are cold or scared and makes your hair “stand up” is the

The hair shaft root is buried in the ______________.

Hair grows from

True or false: Hair grown in cycles of about 3 years, then doesn't grow for about 1.5 years.

A gland attached to the follicle that adds oil to protect the hair is the

Hair texture (straight, curly, wavy) comes from arrangement of the keratin in the ________________ of a hair shaft.

The lowest visible part of the nails is the

True or false: Nails are made of hardened lipids.

_______________ produce oils called sebum to lubricate the skin.

Acne happens from excessive production of ______________ and bacteria.

What controls the sebaceous glands?

Small tubular glands found throughout the skin responsible for evaporative cooling of the body are

Answer in order: In the sweat glands, the twisted ___________________ portion produces sweat and is deep in the dermis, and the ______________ portion is a tube that carries sweat to exit the body.

Most sweat glands are _______________ and regulate body temperature.

Apocrine sweat glands are found in the ___________ and _________________ and are responsible for body odor.

Most characteristics of skin are