FINAL_LABS_BIOS251_Online_Labs_Week_5-Integumentary_system_lab (1)
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BIOS251 OL, Week 5 Lab
Name: Ashly Hogue
OL Lab 5: Integumentary system
Learning Objectives:
Identify the tissue and cellular features of the skin.
Identify the structures associated with the skin.
Correlate the anatomical features to its functions.
Identify the role of the skin in thermoregulation and wound healing.
Part A: Anatomy of the skin
I. Microscopic anatomy of the skin. Complete the table using the image provided:
Structure
Function
A
Stratum corneum
15-30 layers, protection from
microbes and dehydration
B
Stratum granulosum
3-5 layer of flatter
keratinocytes
C
Stratum spinosum
8-10 layers of keratinocytes,
dendritic cells live here
D
Stratum basale
Single layer of mostly basal
cells, also has melanocytes and
merkel cells
E
Basal cell
Cuboidal shaped stem cell that
is a precursor to keratinocytes
F
Tactile nerve fiber
Respond to stimuli
G
dermis
Made up of connective tissue,
strength/eleasticity
H
Dendritic cell
Immune response to microbes
I
Tactile cell
Receptors for touch
J
Living keratinocytes
Produce keratin
K
melanocyte
Produce melanin to give skin
it’s color
BIOS251 OL, Week 5 Lab
Name: Ashly Hogue
II. Gross anatomy of the skin. Complete the table using the image provided.
Structure
Function
A
Hair shaft
Traps air to aid in
insulation
B
Blood capillaries
Supply blood to the skin
C
Arrector muscle
Makes hair stand up
D
Sebaceous gland
Secretes oil
E
Eccrine sweat gland
Secretes water to skin to
regulate body temp
F
Hair bulb
The hair grows from here
G
hypodermis
deepest layer, contains fat
H
Lamellated
corpuscle
Pressure receptor
I
Epidermal ridge
Provide increased surface
area
J
Papillary region
nutrients
K
Reticular region
Strength/elasticity
L
dermis
Assists in thermoregulation
BIOS251 OL, Week 5 Lab
Name: Ashly Hogue
Part B: Thermoregulation
Use the diagram provided, to answer the questions.
1.
Homeostatic regulatory mechanism involves atleast 3 independent components.Identify these
components labeled as A, B, C in the diagram.
A. Receptor
B. The control center
C. The effector
2. Describe in your own words the physiological events that would occur during this feedback mechanism
. The receptor (skin) sends messages to the control center that it is getting too hot or too cold, the control
center (the brain) sends signals to the effector (blood vessels in the skin) to either dilate to bring more
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QUESTION 20
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Dessert - sealed
Date:
Time:
Made: 28/11/21 18:22
Ready: 28/11/21 20:22
Discard:03/12/21 18:22 Fri
OLOGY BLANCHARDSTOWN - Google Chrome
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FTECHNOLOGY BLANCHARDSTOWN
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