The Integumentary System
More Than Skin Deep
• TAKS Objective 2 – The student will
demonstrate an understanding of
living systems and the environment.
• The student knows that, at all level of nature, living
systems are found within other living systems, each with
its own boundary and limits. The student is expected to:
(A) interpret the functions of systems in organisms
including circulatory, digestive, nervous, endocrine,
reproductive, integumentary, skeletal, respiratory,
muscular, excretory, and immune;
(B)compare the interrelationships of organ systems to
each other and to the body as a whole;
• Are your fingerprints the same on your five fingers?
• Do any of your fingerprints have the same pattern as those of your
• Why is a fingerprint a good way to identify a person?
• Where else on your body might you have the kinds of skin patterns
seen on your fingertips?
• What would happen if you were missing an organ?
• Would you consider skin to be an organ? Why or why not?
• Our skin can help identify who we are, but what are some other
functions of our integument?
• Human Epidermal Cells Lab
• MD Anderson Sun SAFETY
• What is skin?
• What are the two layers of the skin?
• Which layer is on the top closest to the
surface of the skin?
• What is the deepest layer of the skin
Explain: What is the Integument?
• The outer most covering of the animal
• Largest organ of the body.
• Covers the entire visible surface of the
body including the SKIN, as well as, hair,
fingernails, and toenails
What are the 2 layers of skin?
• Skin has 2
Two Layers of Skin
– Layer of skin above the dermis.
– Part that sunburns, tans, wrinkles and freckles
– Epithelial cells-dead
– Squamous cells between epithelial and basal
– Contains Basal Cells-Base of this layer
– Melanocytes – make melanin that produces a
tan, makes freckles and moles.
Two Layers of Skin
– Deepest layer of
– Contains blood,
glands, oil glands
and hair follicles
The Skin and Its Functions
• Protection for underlying tissues
• Sense organ
• Maintains a balance of chemicals in the
• Regulates your body temperature to
– Hot - sweat
– Cold – shiver
What are the parts?
• A. Basal Cells/
• B. muscle
• C. sebaceous gland
• D. hair shaft
• E. epidermis
• F. dermis
• G. subcutaneous
• H. fat
• I. arterial blood vessel
• J. sweat gland
• K. hair follicle
• Burn Brochures