Podcast
Questions and Answers
How many layers of the skin are there?
How many layers of the skin are there?
Three
What is the top/outer layer of skin called?
What is the top/outer layer of skin called?
Epidermis
What is the second layer from the top of the skin called?
What is the second layer from the top of the skin called?
Dermis
What is the third layer from the top of skin called?
What is the third layer from the top of skin called?
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Which skin layer contains dermal papillae, papillary, reticular, and nerve endings?
Which skin layer contains dermal papillae, papillary, reticular, and nerve endings?
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Which skin layer contains fat, blood vessels, and connective tissue?
Which skin layer contains fat, blood vessels, and connective tissue?
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Which skin layer contains sweat glands and connective tissue?
Which skin layer contains sweat glands and connective tissue?
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Which skin layer contains stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, stratum germinativum/basale, and the dermal papillae?
Which skin layer contains stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, stratum germinativum/basale, and the dermal papillae?
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In which skin layer are melanocytes found?
In which skin layer are melanocytes found?
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Which skin layer makes new skin cells that travel up and slough off in about 1 month?
Which skin layer makes new skin cells that travel up and slough off in about 1 month?
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Which skin layer makes sweat and sebum?
Which skin layer makes sweat and sebum?
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In which skin layer does hair growth root from?
In which skin layer does hair growth root from?
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In which skin layer do the blood vessels root up from?
In which skin layer do the blood vessels root up from?
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Blood vessels and nerves in the skin grow from which skin layer?
Blood vessels and nerves in the skin grow from which skin layer?
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Which skin layer contains the nerves that allow us to feel sensation?
Which skin layer contains the nerves that allow us to feel sensation?
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Which skin layer attaches the skin to the bones and muscles?
Which skin layer attaches the skin to the bones and muscles?
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Which skin layer brings blood to the skin?
Which skin layer brings blood to the skin?
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Which skin layer contains fat?
Which skin layer contains fat?
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The indentation at the bottom of a hair follicle is called?
The indentation at the bottom of a hair follicle is called?
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Which layer is the papilla found?
Which layer is the papilla found?
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Which layer contains a thin arrangement of collagen fibers that supply nutrients to select layers of the epidermis?
Which layer contains a thin arrangement of collagen fibers that supply nutrients to select layers of the epidermis?
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What are the two main parts of the dermis?
What are the two main parts of the dermis?
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In which layer of the epidermis are keratinocytes made?
In which layer of the epidermis are keratinocytes made?
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Which layer of the epidermis contains dead skin cells and keratin?
Which layer of the epidermis contains dead skin cells and keratin?
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In which layer of the epidermis are Merkel cells made?
In which layer of the epidermis are Merkel cells made?
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The stratum basale/stratum germinativum contains which three types of cells?
The stratum basale/stratum germinativum contains which three types of cells?
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Study Notes
Skin Layers Overview
- Skin consists of three main layers: Epidermis, Dermis, and Subcutaneous (Hypodermis).
Epidermis
- The outermost layer of skin, known for its protective role.
- Contains various strata: Stratum corneum, Stratum lucindum, Stratum granulosum, Stratum spinosum (malpighii), and Stratum germinativum (basale).
- Houses melanocytes, which produce pigment.
- New skin cells are created here, migrating upwards and shedding approximately every month.
- Stratum corneum consists of dead skin cells and keratin.
Dermis
- The second layer under the epidermis, providing strength and flexibility.
- Contains dermal papillae, papillary layer, and reticular layer.
- Responsible for sweat and sebum production through glands.
- Houses hair follicles, with roots originating from this layer.
- Contains nerves that facilitate sensation and blood vessels that supply the skin.
- The papillary layer supplies nutrients to the epidermis and helps regulate temperature.
Subcutaneous (Hypodermis)
- The deepest skin layer, connecting skin to underlying bones and muscles.
- Composed of fat, blood vessels, and connective tissue.
- Blood vessels and nerves grow from this layer, providing support to the upper layers.
Specialized Structures and Cells
- Papilla refers to the indentation at the base of hair follicles, located in the dermis.
- Keratinocytes are produced in the Stratum granulosum of the epidermis.
- The stratum basale (germinativum) contains stem cells (keratinocyte stem cells), melanocytes, Langerhans cells (immune response), and Merkel cells (touch receptors).
Summary of Functions
- Epidermis: Protection, new cell generation, pigmentation.
- Dermis: Sensation, blood supply, glandular secretion, and hair growth.
- Subcutaneous: Insulation, energy storage, and structural support.
Studying That Suits You
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Description
Test your knowledge of the layers of skin with these flashcards. Learn about the epidermis, dermis, and subcutaneous layers, along with their functions and characteristics. Perfect for biology students or anyone interested in human anatomy.
