Questions and Answers
Name three structures that are associated with the integumentary system.
Nails, hair, glands
Which one of the three layers (epidermis, dermis, subcutaneous tissue) is not part of the integument?
Hypodermis
Which one of the two main layers of the dermis is most superficial?
Epidermis
What is the most common connective tissue fiber in the dermis?
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The release of heat from the body by blood vessels occurs in what main layer of the integument?
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Which stratum is the deepest layer of the epidermis?
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Which stratum of the epidermis is the most superficial?
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Approximately how long does it take for the epidermis to renew itself?
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What cell type produces a pigment that darkens the skin?
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What material makes the epidermis tough?
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What integumentary gland secretes oil?
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Which kind of sweat gland (eccrine, apocrine) is involved in evaporative cooling?
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What part of the hair is found on the outside of the skin?
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What does an arrector pili muscle do?
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The outermost portion of the hair is known as the?
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The hair of the axilla is considered _____ hair.
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Explain how electrolysis might destroy the process of hair growth in relation to the hair bulb.
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Explain the fallacy of a person's hair turning white overnight.
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Explain the fallacy of 'feeding' the hair, as claimed by some cosmetics firms.
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What are canaliculi?
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What are modular units of bone called?
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What does each osteon have in the middle?
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What are lacunae?
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What are lamellae?
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The hyoid bone is part of the ____ skeleton.
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How many bones are in the appendicular skeleton?
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How many bones are in the axial skeleton?
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Study Notes
Integumentary System
- Main organ is the skin; associated structures include nails, hair, and glands.
- Hypodermis (subcutaneous tissue) is not part of the integument.
- Epidermis is the most superficial layer of the skin.
- Collagenous fibers are the most common connective tissue fiber in the dermis.
- Heat release occurs through blood vessels in the dermis.
- Stratum basale is the deepest layer of the epidermis; stratum corneum is the most superficial.
- Epidermis takes approximately 6 weeks to renew itself.
- Melanocytes produce the pigment that darkens skin, while keratin makes the epidermis tough.
- Sebaceous glands secrete oil; eccrine sweat glands are involved in evaporative cooling.
- Hair shaft is the external part of hair, while the cuticle is the outermost portion of the hair.
- Arrector pili muscles contract to make hair stand on end.
- Axilla hair is considered determinate hair.
- Electrolysis involves electrical burning of the hair bulb, destroying the hair's vascular supply, preventing hair growth.
- Sudden changes in hair color do not happen overnight; changes occur at the hair root and take time as hair grows out.
- Hair cannot be "fed" from outside; nourishment comes from within the body, but replacing lost oils is beneficial.
Bone Structure
- Canaliculi are thin tubes connecting lacunae, providing passageways through bone.
- Osteons are the modular units of bone.
- Each osteon contains a central canal, which is a hole in the middle.
- Lacunae are spaces occupied by osteocytes (bone cells) in living tissue and appear as rings of dark spots.
- Lamellae are layers of dense mineral salts forming concentric rings between the lacunae.
Skeleton Anatomy
- The hyoid bone is part of the axial skeleton.
- The appendicular skeleton consists of 126 bones.
- The axial skeleton is made up of 80 bones.
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Test your knowledge of the integumentary system with these flashcards focused on Anatomy I Lab Exam II. Covering key structures, layers, and definitions, this quiz is perfect for students preparing for their lab exams.