Skin secretions (human)

sweat gland

Skin secretions are those substances and materials that are secreted by the skin and the external mucous membranes. Some skin secretions are associated with body hair.

Skin secretions originate from glands that in dermal layer of the epidermis. Sweat, a physiological aid to body temperature regulation, is secreted by eccrine glands. Sebaceous glands secrete the skin lubricant sebum. Sebum is secreted onto the hair shaft and it prevents the hair from splitting. It consists mostly of lipids. After the sebum spreads along and up the hair shaft, it is distributed over the skin surface where it lubricates and waterproofs the outer layer of the skin, the stratum corneum.[1][2]

Defensins are substances that are secreted onto the skin surface that are anti-microbial.

## References

1. ↑ Maclean, Allan; Reid, Wendy (2011). "40". in Shaw, Robert. Gynaecology. Edinburgh New York: Churchill Livingstone/Elsevier. pp. 599–612. ISBN 978-0-7020-3120-5; Access provided by the University of Pittsburgh
2. ↑ Fox, Kent M. Van De Graaff, Stuart Ira (1989). Concepts of human anatomy and physiology (2nd ed.). Dubuque, Iowa: Wm. C. Brown Publishers. p. 962. ISBN 0697056759. https://archive.org/details/conceptsofhumana00vand/page/962.

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Skin and related structures

Skin|

| Epidermis|

* Stratum corneum
* Stratum lucidum
* Stratum granulosum
* Stratum spinosum
* Stratum basale

|

Basement membrane|

* Basal keratinocyte
* Lamina lucida
* Lamina densa

Dermis|

* Papillary
* Dermal papillae
* Reticular

Subcutaneous tissue|

* Panniculus/[[Medicine:PPannus (Panniculus adiposus]]
* Panniculus carnosus)
* Membranous layer
* Loose connective tissue
* Superficial fascia

Adnexa|

| Skin glands|

* Sweat glands: Apocrine sweat gland
* Eccrine sweat gland
* Sebaceous

|

Hair|

| Root sheath|

* Outer root sheath
* Inner root sheath
* Henle's layer
* Huxley's layer

|

Hair shaft|

* Cuticle
* Cortex
* Medulla
* Bulb with matrix cells
* Hair follicle

Muscle|

* Arrector pili muscle

Pilosebaceous unit|

* Hair sebaceous gland

Nail|

* Nail matrix
* Nail plate
* Lunula
* Eponychium
* Paronychium
* Hyponychium

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