Anatomy & Physiology Of The Skin
Labeled Diagram Of The Integument:
1. Sweat gland pore
2. Epidermis
3. Dermis
4. Papillary layer of dermis
5. Reticular layer of dermis
6. Hypodermis (Subcutaneous layer)
7. Hair shaft
8. Stratum corneum (Outermost layer
Of the epidermis)
9. Stratum granulosum
10.Stratum spinosum
11.Stratum basale
12.Sebaceous (oil) gland
13.Arrector pili muscle
14.Hair follicle
15.Pacinian (lamellar) corpuscle
Anatomy Exam Questions On The Integument
1. Sweat Gland Pore:
Q1. What is a sweat gland pore?
- A sweat gland pore is a small external opening of the surface of the skin
through which sweat is released from sweat glands.
Q2. Where are sweat gland pores located?
- Sweat gland pores are distributed across nearly the entire surface of the
skin, especially concentrated on the palms, soles, forehead and armpits.
Q3. What structures connect the sweat gland to the pore?
, - A sweat duct connects the coiled secretory portion of the sweat gland
(located in the dermis or hypodermis) to the surface of the skin, ending at
the pore.
Q4. What are the two types of sweat glands, and do they both have pores?
- Eccrine gland: Open directly onto the skin surface via a pore.
- Apocrine glands: Typically empty into hair follicles, not directly through
pores, though they may eventually exit through the follicle’s opening on the
skin surface.
Q5. What tissue layers are involved in the structure of a sweat gland and its pore?
- Epidermis: The pore opens here.
- Dermis: Contains the sweat duct and gland.
- Hypodermis (subcutaneous layer): Larger eccrine glands may extend into
this layer.
Q6. What is the function of the sweat gland pores?
- The pores allow the excretion of sweat onto the skin surface to regulate
body temperature and aid in excretion of waste products.
Q7. What epithelial tissue lines the sweat duct leading to the pore?
- The duct is lined by stratified cuboidal epithelium, which provides
durability and helps regulate sweat transport.
Q8. How do eccrine and apocrine glands differ in structure and pore connection?
- Eccrine glands: Small, coiled, and open directly via a pore.
- Apocrine glands: Larger, open into hair follicles; they don’t have a separate
pore.
Q9. How does the nervous system control sweat gland pore activity?
- Sweat secretion through the pores is stimulated by sympathetic cholinergic
nerve fibers, particularly during thermoregulation or stress.
Q10, How many sweat gland pores does the human body have on average?
- Approximately 2 to 4 million sweat glands exist, each with each pore
(eccrine).
- The highest densities are on the palms, soles, and forehead.
,Q11. What microscopic features are visible at the sweat pore opening?
- Under a microscope. The sweat pore appears as a small opening in the
epidermis, sometimes seens as a depression in the stratum corneum,
surrounded by keratinocytes.
Q12. Are sweat gland pores visible to the naked eye?
- Individually, no — they are microscopic, but in high-density areas like
fingertip or nose, they may appear as tiny dots.
Q13. What is the path of sweat from gland to pore?
- Secretory coil (in dermis) —> Sweat duct (straight + spiral portion) —>
Epidermis —> Sweat pore (on surface).
Q14. Do sweat gland pores differ between the body regions?
- Yes, density and activity vary:
- High density: Palms, soles, forehead.
- Low density: Back, limbs.
- Some areas have larger pores due to higher gland output.
Q15. What conditions can affect the sweat gland pores?
- Hyperhidrosis: Excess sweating due to overactive glands.
- Miliaria (heat rash): Block sweat pores.
- Anhidrosis: Inability to sweat — pore inactivity.
- Infections or occlusions: Can clog pores or cause inflammation.
Q16. What is the embryological origin of sweat gland pores?
- Sweat glands and their ducts (including pores) develop from ectodermal
cells during fetal development.
Q17. Are sweat pores part of any diagnostic test?
- Yes.
- The Minor’s iodine-starch test visualizes active sweat pores by causing
colour change where sweat is secreted.
Q18. Do pores change with age?
- Yes.
- Gland activity decreases with age, so sweat pore output reduces, though the
pores remain anatomically present.
, Q19. Can sweat gland pores regenerate or heal?
- If only the superficial epidermis is damaged, the pores can heal or
regenerate via keratinocyte activity.
- Deep dermal damage may cause permanent loss.
Q20. Do hormones influence sweat gland pores?
- Yes, especially apocrine glands (connected to hair follicles), which become
active after puberty due to androgens.
- Eccrine pores are hormonally dependent but can be influenced during
stress (via adrenaline).
2. Epidermis:
Q1. What is the epidermis?
- The epidermis is the outermost layer of the skin composed of keratinized
stratified squamous epithelium.
- It provides a barrier against pathogens, water loss and environmental
damage.
Q2. What is the main function of the epidermis?
- Its functions include:
- Protection (from microbes, UV radiation, chemicals).
- Waterproofing.
- Sensation (via associated receptors).
- Vitamins D synthesis.
- Regeneration of skin cells.
Q3. What type of tissue makes up the epidermis?
- Keratinized stratified squamous epithelium.
Q4. Is the epidermis vascular or avascular?
- Avascular.
- Meaning it contains no blood vessels,
- It receives nutrients via diffusion from the underlying dermis.
Q5. What are the five layers (strata) of the epidermis (from deep to superficial)>
1. Stratum basale (germinativum).
2. Stratum spinosum.
3. Stratum granulosum.
Labeled Diagram Of The Integument:
1. Sweat gland pore
2. Epidermis
3. Dermis
4. Papillary layer of dermis
5. Reticular layer of dermis
6. Hypodermis (Subcutaneous layer)
7. Hair shaft
8. Stratum corneum (Outermost layer
Of the epidermis)
9. Stratum granulosum
10.Stratum spinosum
11.Stratum basale
12.Sebaceous (oil) gland
13.Arrector pili muscle
14.Hair follicle
15.Pacinian (lamellar) corpuscle
Anatomy Exam Questions On The Integument
1. Sweat Gland Pore:
Q1. What is a sweat gland pore?
- A sweat gland pore is a small external opening of the surface of the skin
through which sweat is released from sweat glands.
Q2. Where are sweat gland pores located?
- Sweat gland pores are distributed across nearly the entire surface of the
skin, especially concentrated on the palms, soles, forehead and armpits.
Q3. What structures connect the sweat gland to the pore?
, - A sweat duct connects the coiled secretory portion of the sweat gland
(located in the dermis or hypodermis) to the surface of the skin, ending at
the pore.
Q4. What are the two types of sweat glands, and do they both have pores?
- Eccrine gland: Open directly onto the skin surface via a pore.
- Apocrine glands: Typically empty into hair follicles, not directly through
pores, though they may eventually exit through the follicle’s opening on the
skin surface.
Q5. What tissue layers are involved in the structure of a sweat gland and its pore?
- Epidermis: The pore opens here.
- Dermis: Contains the sweat duct and gland.
- Hypodermis (subcutaneous layer): Larger eccrine glands may extend into
this layer.
Q6. What is the function of the sweat gland pores?
- The pores allow the excretion of sweat onto the skin surface to regulate
body temperature and aid in excretion of waste products.
Q7. What epithelial tissue lines the sweat duct leading to the pore?
- The duct is lined by stratified cuboidal epithelium, which provides
durability and helps regulate sweat transport.
Q8. How do eccrine and apocrine glands differ in structure and pore connection?
- Eccrine glands: Small, coiled, and open directly via a pore.
- Apocrine glands: Larger, open into hair follicles; they don’t have a separate
pore.
Q9. How does the nervous system control sweat gland pore activity?
- Sweat secretion through the pores is stimulated by sympathetic cholinergic
nerve fibers, particularly during thermoregulation or stress.
Q10, How many sweat gland pores does the human body have on average?
- Approximately 2 to 4 million sweat glands exist, each with each pore
(eccrine).
- The highest densities are on the palms, soles, and forehead.
,Q11. What microscopic features are visible at the sweat pore opening?
- Under a microscope. The sweat pore appears as a small opening in the
epidermis, sometimes seens as a depression in the stratum corneum,
surrounded by keratinocytes.
Q12. Are sweat gland pores visible to the naked eye?
- Individually, no — they are microscopic, but in high-density areas like
fingertip or nose, they may appear as tiny dots.
Q13. What is the path of sweat from gland to pore?
- Secretory coil (in dermis) —> Sweat duct (straight + spiral portion) —>
Epidermis —> Sweat pore (on surface).
Q14. Do sweat gland pores differ between the body regions?
- Yes, density and activity vary:
- High density: Palms, soles, forehead.
- Low density: Back, limbs.
- Some areas have larger pores due to higher gland output.
Q15. What conditions can affect the sweat gland pores?
- Hyperhidrosis: Excess sweating due to overactive glands.
- Miliaria (heat rash): Block sweat pores.
- Anhidrosis: Inability to sweat — pore inactivity.
- Infections or occlusions: Can clog pores or cause inflammation.
Q16. What is the embryological origin of sweat gland pores?
- Sweat glands and their ducts (including pores) develop from ectodermal
cells during fetal development.
Q17. Are sweat pores part of any diagnostic test?
- Yes.
- The Minor’s iodine-starch test visualizes active sweat pores by causing
colour change where sweat is secreted.
Q18. Do pores change with age?
- Yes.
- Gland activity decreases with age, so sweat pore output reduces, though the
pores remain anatomically present.
, Q19. Can sweat gland pores regenerate or heal?
- If only the superficial epidermis is damaged, the pores can heal or
regenerate via keratinocyte activity.
- Deep dermal damage may cause permanent loss.
Q20. Do hormones influence sweat gland pores?
- Yes, especially apocrine glands (connected to hair follicles), which become
active after puberty due to androgens.
- Eccrine pores are hormonally dependent but can be influenced during
stress (via adrenaline).
2. Epidermis:
Q1. What is the epidermis?
- The epidermis is the outermost layer of the skin composed of keratinized
stratified squamous epithelium.
- It provides a barrier against pathogens, water loss and environmental
damage.
Q2. What is the main function of the epidermis?
- Its functions include:
- Protection (from microbes, UV radiation, chemicals).
- Waterproofing.
- Sensation (via associated receptors).
- Vitamins D synthesis.
- Regeneration of skin cells.
Q3. What type of tissue makes up the epidermis?
- Keratinized stratified squamous epithelium.
Q4. Is the epidermis vascular or avascular?
- Avascular.
- Meaning it contains no blood vessels,
- It receives nutrients via diffusion from the underlying dermis.
Q5. What are the five layers (strata) of the epidermis (from deep to superficial)>
1. Stratum basale (germinativum).
2. Stratum spinosum.
3. Stratum granulosum.
