Complete the following chart, and then circle the layer that is found.pdf

Complete the following chart, and then circle the layer that is found beneath the skin. How do
the cells of stratum corneum and stratum basale differ? ____ State the specific location of
melanin observed in dark skin ____ Which is darker, the anterior forearm or the posterior
forearm ____ Explain why ____ What special qualities, due to the presence of fibers, does the
connective tissue of the dermis have? ___How is the structure of the thick skin of the palms of
the hands and soles of the feet properly suited for its function? ____
Solution
1. ANS:
A. Epidermis
Location: outermost layer of the skin
Tissues: Epithelial tissue
Characteristics: It is a protective waterproof barrier that also keeps pathogens at bay and
regulates body temperature
B. Dermis:
Location: Middle layer present in beneath the epidermis of the skin
Tissues: Connective tissue
Characteristics: It is a thick layer of fibrous and elastic tissue (made mostly of collagen, elastin,
and fibrillin) that gives the skin its flexibility and strength.
C. Hypo dermis:
Location: Deeper subcutaneous tissue layer of the skin
Tissues: Fat and connective tissue
Characteristics: It maintains the body temperature.
2. ANS:
Stratum corneum and stratum basale difference:
The cells of stratum basale are cuboidal to columnar and the stratum corneum cells are made
with keratin.
3. ANS:
In the location of stratum basale, melanin content specifically observed in dark (heavily
pigmented) skin.
4. ANS:
The dorsal side (posterior) of the forearm is the \"top\" side-- the side that usually faces upward
and is generally darker than anterioir side. It is mainly due to melanin and hair follicles.
5. ANS:
The special qualities of dermis connective tissue can contains with Collagenous fibers, elastic
fibers, and a gel-like substance.
6. ANS:
The sole of feet and the palms of hands are structured to perform day to day functions. The
hardness on the skin on these locations is due to the layers of epidermis that contain dead
keratinocytes are the Stratum corneum and stratum lucidum
Stratum lucidum: Thin, clear layer present in the thick skin of the palms and soles; no remaining
living cells.
Stratum corneum: Several layers of keratinized corneum; a collagenous matrix composed of the
products of dead cells. Keratin and the thickened plasma membrane protect the skin against
abrasion and penetration, and the glycolipid between its cells nearly waterproofs this layer..

1. Complete the following chart, and then circle the layer that is found beneath the skin. How do
the cells of stratum corneum and stratum basale differ? ____ State the specific location of
melanin observed in dark skin ____ Which is darker, the anterior forearm or the posterior
forearm ____ Explain why ____ What special qualities, due to the presence of fibers, does the
connective tissue of the dermis have? ___How is the structure of the thick skin of the palms of
the hands and soles of the feet properly suited for its function? ____

Solution

1. ANS:
A. Epidermis
Location: outermost layer of the skin
Tissues: Epithelial tissue
Characteristics: It is a protective waterproof barrier that also keeps pathogens at bay and
regulates body temperature
B. Dermis:
Location: Middle layer present in beneath the epidermis of the skin
Tissues: Connective tissue
Characteristics: It is a thick layer of fibrous and elastic tissue (made mostly of collagen, elastin,
and fibrillin) that gives the skin its flexibility and strength.
C. Hypo dermis:
Location: Deeper subcutaneous tissue layer of the skin
Tissues: Fat and connective tissue
Characteristics: It maintains the body temperature.
2. ANS:
Stratum corneum and stratum basale difference:
The cells of stratum basale are cuboidal to columnar and the stratum corneum cells are made
with keratin.
3. ANS:
In the location of stratum basale, melanin content specifically observed in dark (heavily
pigmented) skin.
4. ANS:
The dorsal side (posterior) of the forearm is the \"top\" side-- the side that usually faces upward
and is generally darker than anterioir side. It is mainly due to melanin and hair follicles.
5. ANS:
The special qualities of dermis connective tissue can contains with Collagenous fibers, elastic

2. fibers, and a gel-like substance.
6. ANS:
The sole of feet and the palms of hands are structured to perform day to day functions. The
hardness on the skin on these locations is due to the layers of epidermis that contain dead
keratinocytes are the Stratum corneum and stratum lucidum
Stratum lucidum: Thin, clear layer present in the thick skin of the palms and soles; no remaining
living cells.
Stratum corneum: Several layers of keratinized corneum; a collagenous matrix composed of the
products of dead cells. Keratin and the thickened plasma membrane protect the skin against
abrasion and penetration, and the glycolipid between its cells nearly waterproofs this layer.