Questions and Answers
What type of gland are apocrine glands?
What are arrector pili?
Small muscles which attach to hair follicles.
What is the basement membrane?
A thin, delicate membrane separating an epithelium from underlying tissue.
What are dermal papillae?
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What is the dermis?
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What are eccrine sweat glands?
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What is the epidermis?
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What is a hair follicle?
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What is a freckle?
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What does the hypodermis do?
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What is keratin?
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What is lanugo?
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Who was Meissner?
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What is melanin?
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What are melanocytes?
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What are Pacinian corpuscles?
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What is a papilla?
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What is perspiration?
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What is the pigment layer?
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What is a pore?
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What is a sebaceous gland?
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What is sebum?
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What does stratum refer to?
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What is the stratum germinativum?
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What does integument consist of?
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Study Notes
Apocrine Sweat Gland
- Located at the junction of the dermis and subcutaneous fat
- Composed of a coiled secretory portion and a straight portion that secretes into hair follicles
Arrector Pili
- Small muscles attached to hair follicles in mammals
- Causes hair to stand on end, resulting in goose bumps when contracted
Basement Membrane
- A delicate membrane made of protein fibers and glycosaminoglycans
- Separates epithelial tissue from underlying tissue layers
Dermal Papilla
- Small, nipple-like extensions of the dermis into the epidermis
- Play a role in enhancing the exchange of nutrients and waste between the dermis and epidermis
Dermis
- The thick layer of skin beneath the epidermis
- Provides structural support, elasticity, and houses blood vessels, nerves, and glands
Eccrine Sweat Gland
- Major sweat glands found all over human skin
- Responsible for thermoregulation through sweat secretion
Epidermis
- The outermost layer of cells covering the skin
- Provides a barrier against environmental agents and contributes to the skin's appearance
Follicle
- A small secretory cavity or sac, particularly referring to hair follicles
- Essential for hair growth and development
Freckle
- Small patches of light brown color on the skin
- Become more pronounced with sun exposure and are genetic in nature
Hypodermis
- Layer of cells beneath the dermis in certain organisms
- Often associated with fat storage and insulation
Keratin
- A fibrous protein that forms the structural basis of hair, nails, and skin
- Provides strength and resilience to these structures
Lanugo
- Fine, soft hair that covers the body of a human fetus or newborn
- Often shed shortly after birth
Meissner's Corpuscles
- Specialized tactile receptors in the skin
- Sensitive to light touch and located in areas such as fingertips
Melanin
- A dark brown to black pigment present in hair, skin, and eyes
- Plays a crucial role in protecting skin from UV radiation
Melanocyte
- Melanin-producing cells typically found in the skin
- Responsible for skin pigmentation and protection against UV damage
Pacinian Corpuscles
- A type of mechanoreceptor found in the skin
- Sensitive to pressure and vibrations
Papilla
- A small rounded protuberance found on various parts of the body
- In the context of the skin, contributes to the structure of hair follicles
Perspiration
- The bodily process of sweating
- Essential for thermoregulation and waste removal
Pigment Layer
- The layer of the epidermis containing melanocytes
- Responsible for skin color and pigmentation patterns
Pore
- Tiny openings in the skin’s surface
- Allow for the passage of gases, liquids, and particles
Sebaceous Gland
- Small glands in the skin that secrete sebum
- Help to lubricate and moisturize the skin and hair follicles
Sebum
- Oily secretion produced by sebaceous glands
- Serves as a natural moisturizer for skin and hair
Stratum
- Refers to layers of material or social classifications
- In skin anatomy, indicates specific layers such as the stratum germinativum
Stratum Germinativum
- The innermost layer of the epidermis
- Responsible for generating new skin cells through division
Integument
- Comprises skin, mucous membranes, hair, and nails
- Acts as a protective barrier and sensory interface with the environment
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