BIOS251 OL, Week 5 Lab.pdf 1 BIOS251 OL, Week 5 Lab.pdf
BIOS251 OL, Week 5 Lab
Name: Danielle DeLeon
Part A: Anatomy of the skin
I. Microscopic anatomy of the skin. Complete the table using the image provided:
Structure Function
A Stratum Protects deeper layers from
corneum injury and microbial invasion
B Stratum Consist of serval layers of
granulosum keratinocytes, thickest stratum.
On hands and soles of feet
C Stratum Contains melanocytes and
spinosum intraepidermal and
macrophages.
D Stratum As stem cells divide, they give
Basal rise to keratinocytes that migrate
towards the surface and replace
lost epidermis cells.
E Basement Separates tissues and protects
Membrane them from mechanical stress.
F Tactile nerve Receptors for touch
fiber
G Dermis To protect and support the skin
and deeper layers, assist in the
thermoregulation, and aid in
sensation.
H Dendritic cell Macrophages originating in the
bone marrow that guard against
pathogens.
I Tactile cell Touch receptor cells associated
with dermal nerve fibers.
J keratinocytes Synthesizing keratin
K Melanocytes Synthesize the brown to black
pigment melanin.
This study source was downloaded by 1827175 from cliffsnotes.com on 01-08-2026 18:18:40 GMT -06:00
BIOS251 OL, Week 5 Lab.pdf BIOS251 OL, Week 5 Lab.pdf BIOS251 OL, Week 5 Lab.pdf
https://www.cliffsnotes.com//study-notes/19113589
, BIOS251 OL, Week 5 Lab.pdf 2 BIOS251 OL, Week 5 Lab.pdf
BIOS251 OL, Week 5 Lab
Name: Danielle DeLeon
II. Gross anatomy of the skin. Complete the table using the image provided.
Structure Function
A Hair shaft Protects above the surface of
the skin
B blood vessel Responsible for the blood flow
from the heart throughout the
body from the
C Arrector muscle To shift the position of hair
follicles by contracting and
relaxing.
D Sebaceous gland Produce and secrete sebum
E Eccrine sweat gland Regulates body temperature
F Hair bulb Active site for hair growth
G Hypodermis Pads the body and binds the
skin to the underlying tissues.
H Lamellate (Pacinian) Sensory receptors for vibration
Corpuscle (pressure and deep pressure and are
receptor) essential for proprioception.
I Dermal papilla Hair formation. Growth, and
cycling.
J Epidermis Acts as a protective barrier
K Dermis To protect and support the skin
and deeper layers, assist in the
thermoregulation, and aid in
sensation.
L Skin Resistance to trauma and
infection, other barrier
functions, vitamin D synthesis,
sensation, thermaregulation,
and nonverbal communication
This study source was downloaded by 1827175 from cliffsnotes.com on 01-08-2026 18:18:40 GMT -06:00
BIOS251 OL, Week 5 Lab.pdf BIOS251 OL, Week 5 Lab.pdf BIOS251 OL, Week 5 Lab.pdf
https://www.cliffsnotes.com//study-notes/19113589
BIOS251 OL, Week 5 Lab
Name: Danielle DeLeon
Part A: Anatomy of the skin
I. Microscopic anatomy of the skin. Complete the table using the image provided:
Structure Function
A Stratum Protects deeper layers from
corneum injury and microbial invasion
B Stratum Consist of serval layers of
granulosum keratinocytes, thickest stratum.
On hands and soles of feet
C Stratum Contains melanocytes and
spinosum intraepidermal and
macrophages.
D Stratum As stem cells divide, they give
Basal rise to keratinocytes that migrate
towards the surface and replace
lost epidermis cells.
E Basement Separates tissues and protects
Membrane them from mechanical stress.
F Tactile nerve Receptors for touch
fiber
G Dermis To protect and support the skin
and deeper layers, assist in the
thermoregulation, and aid in
sensation.
H Dendritic cell Macrophages originating in the
bone marrow that guard against
pathogens.
I Tactile cell Touch receptor cells associated
with dermal nerve fibers.
J keratinocytes Synthesizing keratin
K Melanocytes Synthesize the brown to black
pigment melanin.
This study source was downloaded by 1827175 from cliffsnotes.com on 01-08-2026 18:18:40 GMT -06:00
BIOS251 OL, Week 5 Lab.pdf BIOS251 OL, Week 5 Lab.pdf BIOS251 OL, Week 5 Lab.pdf
https://www.cliffsnotes.com//study-notes/19113589
, BIOS251 OL, Week 5 Lab.pdf 2 BIOS251 OL, Week 5 Lab.pdf
BIOS251 OL, Week 5 Lab
Name: Danielle DeLeon
II. Gross anatomy of the skin. Complete the table using the image provided.
Structure Function
A Hair shaft Protects above the surface of
the skin
B blood vessel Responsible for the blood flow
from the heart throughout the
body from the
C Arrector muscle To shift the position of hair
follicles by contracting and
relaxing.
D Sebaceous gland Produce and secrete sebum
E Eccrine sweat gland Regulates body temperature
F Hair bulb Active site for hair growth
G Hypodermis Pads the body and binds the
skin to the underlying tissues.
H Lamellate (Pacinian) Sensory receptors for vibration
Corpuscle (pressure and deep pressure and are
receptor) essential for proprioception.
I Dermal papilla Hair formation. Growth, and
cycling.
J Epidermis Acts as a protective barrier
K Dermis To protect and support the skin
and deeper layers, assist in the
thermoregulation, and aid in
sensation.
L Skin Resistance to trauma and
infection, other barrier
functions, vitamin D synthesis,
sensation, thermaregulation,
and nonverbal communication
This study source was downloaded by 1827175 from cliffsnotes.com on 01-08-2026 18:18:40 GMT -06:00
BIOS251 OL, Week 5 Lab.pdf BIOS251 OL, Week 5 Lab.pdf BIOS251 OL, Week 5 Lab.pdf
https://www.cliffsnotes.com//study-notes/19113589
