SOLUTIONS TO EXERCISES, LESSON 3
The integumentary system includes the integument proper (skin) and the
integumentary derivatives (hairs, nails, and glands of the skin). (para 3-1a)
Another name for the integument proper is the skin. (para 3-1a)
Three types of integumentary derivatives are the hair, nails, and various
A fascia is a sheet or collection of fibrous connective tissue (FCT).
The subcutaneous layer (superficial fascia) is the connective tissue which lies
Deep fasciae are found as envelopes for muscles and other organs and they
The investing deep fascia is the third envelope of the whole body beneath the
The outer layer of the skin is the epidermis. The inner and deeper layer of
The epidermis is a stratified squamous epithelium.
The basic structure of the innermost layer of the epidermis is a single layer of
columnar-type epithelial cells.
The cells found in the outermost layers of the epidermis are transparent,
flattened, dead, cornified, and without nuclei. (para 3-3a)
The dermis is dense FCT consisting of white and yellow fibers.
Papillae are finger-like projections of the dermis that extend into the
Papillae prevent the dermis and epidermis from sliding on each other.
Other structures found in the dermis include blood vessels, lymph vessels,
A hair follicle is formed by the extension of the skin (dermis and epidermis)
deeper into the surface of the body. At the base of the hair follicle is the hair
root. The hair shaft grows out from the root. The hair shaft is made of cells
Sweat glands consist of a coiled secretory portion and a wavy duct which