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The Integumentary System

the skin, eyes, and hair.

Melanoma
A melanoma is a malignant tumor that originates in melanocytes. It is a highly malignant form of
skin cancer, and, though rare, is responsible for the majority of skin cancer-related deaths.

Onychosis
Deformity or disease of the nails

Papillary
The papillery layer is outermost and extends into the epidermis to supply it with vessels. It is
composed of loosely arranged fibres. Papillary ridges make up the lines of the hands.

Recticular Layer
The reticular layer is more dense and is continuous with the hypodermis. It contains the bulk of
the structures (such as sweat glands). The reticular layer is composed of irregularly arranged
fibres and resists stretching.

For more fun pictures of other skin diseases and skin problems "click" to this cool website
"Dermatology Image Database". Note: From this link then click "Clinical Skin Diseases Images".

Review Questions

1. Name all of the parts of the integumentary system.
2. Name the cells that produce melanin and describe its function.
3. Name and describe the importance of the cutaneous senses.
4. Explain how sweating helps maintain normal body temperature.
5. Explain where on the body hair has important functions and describe these functions.

References

Brannon, Heather (2006). "Nail Anatomy" About, Inc., A part of The New York Times
Company.

American Academy of Dermatology - Nail Health

Cobb, Judith. Fingernails, Jewels or Tools? Nature's Field - Nail diagnosis

Graaff, Van De (2002). Human Anatomy, Sixth Edition. New York: McGraw-Hill.

Mader, Sylvia S. (2004). Human Biology. New York: McGraw-Hill.

Sorrentino, Sheila A. (2004). Mosby's textbook for Nursing Assistants, 6th Edition. St. Louis,
Missouri: Mosby.

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