Integumentary System
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| An oily secretion that helps to waterproof body surface | Sebum
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| Outermost layer of epidermis | Stratum corneum
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| Become active at puberty | Apocrine sweat gland
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| Epidermal pigment | Melanin
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| Inner layer of skin | Epidermis
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| Responds to elevated body temperature | Eccrine sweat gland
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| General name of entire superficial layer of the skin | Dermis
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| Gland that secretes an oily substance | Sebaceous gland
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| Hard protein of nails and hair | Keratin
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| Cell division and deepest layer of epidermis |
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| Tube like part that contains the root of the hair | Hair follicle
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| Causes hair to stand on end and goose bumps to appear | Arrector pili muscle
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| How does the skin of your palm differ from that on the back (posterior) of your hand? | The palms have an additional layer of thickened and hairless skin called the stratum lucidum
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| Describe the differences you observed in the type and distribution of hair on the front (anterior) and back (posterior) of your forearm. |
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| Explain how a hair is formed. | Epidermal cells at the base of the hair follicle dive and grow, pushing older cells outward; as these cells die, they become keratinized parts of the hair.
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| What cells produce the pigment in hair? | The pigment melanin is produced by melanocytes
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| Distinguish the locations and tissues among epidermis, dermis, and subcutaneous layer. | The epidermis is the superficial layer composed of stratified squamous epithelium. The dermis is the deep layer of skin composed mostly of irregular dense connective tissue. The subcutaneous layer is beneath the dermis and composed of areolar and adipos
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| How do the cells of stratum corneum and stratum basale differ? | Cells of the stratum basale are living and reproduce actively; cells of the stratum corneum are dead and keratinized and form the surface layer of the skin.
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| State the specific location of melanin observed in dark (heavily pigmented) skin. | Melanin is found in the stratum basale.
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| What special qualities does the connective tissue of the dermis have? | It contains both elastic and collagenous fibers that give the dermis the qualities of elasticity and strength.
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| What part of the hair extends from the hair papilla to the body surface? | Hair Root
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| In which layer of skin are sebaceous glands found? | Dermis
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| How are sebaceous glands associated with hair follicles? | Sebaceous glands are connected to hair follicles and secrete sebum into the follicles.
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| In which layer of skin are sweat glands usually located? | Hair Follicles
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