Sebaceous/Oil gland

Sebaceous (oil) gland is a type of gland that is found in the dermis and associated with the hair follicle.  It is a type of holocrine secretion, in which cells of the gland degenerate and release the content, known as sebum.  Sebum are directly secreted onto the hair to maintain its health and structural integrity.

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Oil gland’s association with hair follicle.  (TM: 400x, picture taken with a Zeiss F40/0.65 on Sony NEX-6)
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Oil gland showing its route of release onto the hair shaft.  (TM: 400x, picture taken with a Zeiss Planapo 40/1.0 Oil on Sony A7ii)
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Oil gland and its relation to the hair bulb.  (TM: 400x, picture taken with a Zeiss Planapo 40/1.0 Oil on Sony A7ii)
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Reticular dermis of scalp, showing the difference between sweat and oil gland. Annotated version can be found here. (TM:100x, picture taken with Nikon Planapo 10/0.4 on Sony A7ii)
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Close-up of the same specimen above.  (TM: 400x, picture taken with Zeiss Planapo 40/1.0 Oil on Sony A7ii)

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