Intro to Histology (9/4b) Flashcards Preview

PT605 > Intro to Histology (9/4b) > Flashcards

Flashcards in Intro to Histology (9/4b) Deck (43)
Loading flashcards...
31

Dermis - Description

2 strata

serves as blood supply for epidermis

32

Dermis - Layers

Papillary stratum
Reticular stratum

33

Dermis - Papillary Stratum

Dermal papillae - aids in stability of holding dermis to underlying dermal layer

HAS: Meissner's corpuscles, fibroblasts

34

Dermis - Reticular Stratum

serves as support and structure

lymphatic vessels - Langerhan's can bring antigens here

dense irregular connective tissue (mostly collagen)

HAS: hair follicles and sebaceous glands

35

Meissner's corpuscles

tactile sensory receptors for low frequency vibration and refined touch

36

Fibroblasts

assist with wound healing

37

Epidermal skin appendages

Hair and sebaceous and sweat glands

Derived from down growth of epidermal epithelium during development

Epithelium of these appendages can serve as a source of stem cells for skin wound repair

Secrete sebum to prevent water loss

38

Hypodermis/Subcutaneous Layer

Deepest layer of skin

Loose CT - adipose tissue (for insulation, body temp)

Sweat Glands –eccrine and apocrine

indicated by a lot of white space

HAS: Pacinian/Lamellar corpuscles

39

Pacinian/Lamellar corpuscles

mechanoreceptors for vibration and deep pressure

40

Integument Nerve Supply - Epidermal

Free nerve endings

Merkel's cells

41

Integument Nerve Supply - Dermal

Ruffini’s corpuscles

Meissner’s corpuscles

42

Integument Nerve Supply - Hypodermal

Pacinian corpuscles

43

Ruffini’s corpuscles

mechanoreceptors for perception of heat, stretching, and sustained pressure on skin