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| Â | Muscle Tissue |
 | | Smooth muscle is found in the dermis of the skin (arrector pili). | | | Smooth muscle is found in the eye ( iris diaphragm, controlling the amount of light reaching the retina). |
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http://www.technion.ac.il/~mdcourse/274203/lect6.html
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| Â | MSN Encarta - Skin |
| | Each hair follicle also contains the arrector pili, a muscle that contracts in response to cold, fright, and other emotions. | | | Hair on the scalp typically grows at a rate of 1 mm (0.04 in) every three days. |
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http://ca.encarta.msn.com/encyclopedia_761569048/Skin.html
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| Â | Example: Arrector Pili Muscle |
| | Unlike the hair, which is ectodermal in origin, and part of the epidermis, the arrector pili is a true dermal structure. | | | Muscle is derived from embryonic mesoderm, and the arrector pili is no exception. | | | Here's the arrector pili muscle, originating in the dermis and inserting on the outer CT sheath of the hair follicle. |
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http://education.vetmed.vt.edu/Curriculum/VM8054/Labs/Lab15/EXAMPLES/Exarrpil.htm
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| Â | Electronic Textbook of Dermatology, Anatomy of the Skin |
| | Arrector pili muscles are supplied by adrenergic nerves, and are responsible for the erection of hair during cold or emotional stress ('goose flesh'). | | | A small bundle of smooth muscle fibers, the arrector pili muscle, extends from just beneath the epidermis and is attached to the side of the follicle at an angle. | | | At the lower end of the follicle is the hair bulb, part of which, the hair matrix, is a zone of rapidly dividing cells which is responsible for the formation of the hair shaft. |
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http://www.telemedicine.org/anatomy.htm
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| Â | Virtual Hospital: Atlas of Microscopic Anatomy: Section 1 - Cells |
| | Also note the relationship between the hair follicle, sebaceous gland, and arrector pili muscle. | | | The smooth muscle bundles forming the arrector pili muscle are obliquely placed in relation to the epidermis. | | | Contraction of the muscle results in the erection of the hair shaft (and follicle), producing depressions in the skin (orange peel appearance) commonly known as gooseflesh, and compresses sebaceous glands aiding in the emptying of the glands into the hair follicle, thereby oiling the hair shaft. |
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http://www.vh.org/adult/provider/anatomy/MicroscopicAnatomy/Section07/Plate07144.html
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| Â | integumentary system |
| | Stimulation of the arrector pili muscle makes the hair stand on end. | | | Other cells contained within the epidermis form an integral part of the immune system. | | | Each hair follicle is attached to smooth muscle cells (arrector pili). |
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http://www.nurseminerva.co.uk/integ.html
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| Â | Integ 22 |
| | Each hair follicle has an arrector pili muscle attached to it that can cause the hair to stand up straight. | | | Hair follicles are composed of a deep involution of epidermis, and they produce the hair, but they do not move it. | | | Elastic fibers in the papillary layer of the dermis give it elasticity, but they cannot move the hairs or hair follicles. |
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http://www.fortlewis.edu/academics/school_arts_sciences/biology/anatphys/integ22.htm
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| Â | arrector set |
| | An area of the skin that would require an arrector pili muscle of this size would be the larger facial whiskers of a cat or dog. |
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http://cal.vet.upenn.edu/histo/skin/arrector.html
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| Â | Integument |
| | The smooth muscle cells, or arrector pili muscles, are associated with hair follicles. | | | Fibroblasts, macrophages and smooth muscle cells are located within the dermis. | | | Hypodermis is the deepest layer of integument and is commonly referred to as superficial fascia. |
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http://courses.smsu.edu/emh420f/integument.htm
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| Â | Arrector pili |
| | Two views of an arrector pili muscle embedded in connective tissue. | | | Be able to distinguish smooth muscle from connective tissues. | | | The muscle is lighter staining, more homogeneous (as a bundle) and less red or pink. |
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http://cellbio.utmb.edu/microanatomy/smmus.htm
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| Â | Virtual Hospital: Atlas of Microscopic Anatomy: Section 7: Integument |
| | The glands discharge their contents by the contraction of the arrector pili muscle and by any pressure applied to the gland. | | | Hair follicles and smooth muscle (arrector pili), sweat and sebaceous glands, and Pacinian corpuscles are located in the reticular layer ( Plates 143, 145, 146 and 147). | | | Associated with the follicle are sebaceous glands and the arrector pili smooth muscle fiber bundle ( Plates 83, 145, and 147). |
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http://www.vh.org/Providers/Textbooks/MicroscopicAnatomy/Section07/Section07.html
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| Â | School of Anatomy - ANAT2200- Glossary |
| | arrector pili (arrectores pilorum) L. arrector = raiser + pilus = hair; autonomically innervated smooth muscles oriented obliquely in dermis, creating "gooseflesh". |
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http://anatomy.med.unsw.edu.au/teach/anat2200/2000/appen4.htm
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| Â | Thermoregulation |
| | In cold environments, birds and mammals can compensate for heat loss by: | | | utilizing small smooth muscles (arrector pili in mammals) which are attached to feather or hair shafts; this shivering thermogenesis distorts the surface of the skin as the feather/hair shaft is made more erect (called goose flesh or pimples). |
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http://www.sciencedaily.com/encyclopedia/thermoregulation
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| Â | Histology Review Carousel 4 |
| | Poor slide, but does show spindly, corkscrew nuclei when contracted. | | | In gut, surrounding Tubes in respiratory, urinary tracts, Arrector pili, etc |
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http://medic.med.uth.tmc.edu/edprog/histolog/muscle/hist-05.htm
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| Â | Science Project |
| | They are attached to most of the Arrector Pili. | | | When the hair reaches the Keratinization Zone the hair cells die. |
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http://www.selah.wednet.edu/SOAR/SciProj2000/MckenzieH.html
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| Â | Noggin is required for induction of the hair follicle growth phase in postnatal skin -- BOTCHKAREV et al. 15 (12): 2205 ... |
| | D) BMPR-IA immunoreactivity in the secondary hair germ (small arrowhead), the arrector pili muscle (large arrowhead), and the sebaceous gland (asterisk). | | | Abbreviations: APM, arrector pili muscle; DER, dermis; DP, dermal papilla; EP, epidermis; HM, hair matrix; HS, hair shaft; IRS, inner root sheath; Mel, melanin; ORS, outer root sheath; SC, subcutis; SHG, secondary hair germ; SG, sebaceous gland. | | | In contrast to noggin, strong BMPR-IA immunoreactivity was seen |
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http://www.fasebj.org/cgi/content/full/15/12/2205
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| Â | [No title] |
| | epidermis dermis hair shaft hair follicles arrector pili muscle eccrine sweat glands sebaceous glands papillary layer of the dermis reticular layer of the dermis subcutaneous layer/hypodermis (look for adipose connective tissue) Integument Model Ð Thin and Thick Skin - 2 models in one (see p. |
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http://www.angelo.edu/faculty/rwilke/word-lists/integ.doc
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| Â | Controls of Hair Follicle Cycling -- Stenn and Paus 81 (1): 449 -- Physiological Reviews |
| | Although morphogenesis and cycling are distinct phenomena, they share morphologic and molecular features (see text). | | | DP, follicular papilla; SG, sebaceous gland; APM, arrector pili muscle; HS, hair shaft; mel, melanin; BM, basement membrane; POD, programmed organ deletion; HF, hair follicle; ORS, outer root sheath; IRS, internal root sheath. | | | The 8 cellular lineages of the mature follicle are illustrated by these histological preparations. |
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http://physrev.physiology.org/cgi/content/full/81/1/449
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| Â | encyclopedia |
| | A minute muscle, the arrector pili, is attached to each hair follicle; under the control of the autonomic nervous system the muscle contracts to make the hair “stand on end.” Most mammals possess tactile hairs, usually growing from the upper lip and eyebrows, with their roots set in erectile tissue richly supplied with sensory nerves. |
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http://www.vitaminsfact.com/vitamins-supplements-a-h.html
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