Learning check ▪ Identify the layers of the Epidermis based on the description. Only found in thick skin Only one cell thick Several layers of dead skin
Learning check ▪ Identify the layers of the Epidermis based on the description. Only found in thick skin Only one cell thick Several layers of dead skin
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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1. Stem cells
Layers of Epidermis
Learning check
• Identify the layers of the Epidermis based on the
description.
Only found in thick skin
Only one cell thick
Several layers of dead skin
Cells of the Epidermis
▪ Divide and produce keratinocytes
. Only in stratum basale (deepest layer of epidermis)
2. Keratinocytes
Make melani
ke melanin-a brown to black pigment
Synthesize keratin
• Vast majority of epidermal cells (found in many layers)
3. Melanocytes
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Melanin is taken up by keratinocytes and used to protect
their DNA from ultraviolet radiation
4. Tactile (Merkel) cells
• Touch receptors that join with nerves
. Only found in stratum basale
Slide 11 of 26
.Found in stratum basale
.Found in stratum spinosum, stratum granulosum (two middle
layers of epidermis)
Cells of the Epidermis
5. Dendritic (Langerhans) cells
• Immune surveillance
.Found in stratum spinosum, stratum granulosum (two middle
layers of epidermis)
Cells and Layers of the Epidermis
Learning check
▪ Identify the cells of the Epidermis based on the description.
Touch receptors found in stratum basale
Found in many layers and make keratin
Make melanin and found in the stratum basale
The Dermis
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Learning check
▪ Identify the layers of the Epidermis based on the
description.
Only found in thick skin
Only one cell thick
Several layers of dead skin
56°F Partly sunny
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