INTEGUMENTARY SYSTEM
➢ Skin thin type
thick type
➢ Keratinized adnexa hair
nail
➢ Nonkeratinized adnexa small sweat glands
great sweat glands
sebaceous glands
mammary glands
Skin (integumentum)
Epidermis
stratum corneum proprium
(stratum lucidum)
stratum granulosum
stratum spinosum
stratum basale
Dermis (corium)
pars papillaris
pars reticularis
Hypodermis
Epidermis
dermis
melanocytes
melanin
Thin skin Thick skin
Occurence: palma manus, planta pedis
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Skin glands small sweat (eccrine)
large sweat (apocrine)
sebaceous (holocrine) Gll. sebaceae
General structure of glands:
➢excretory portion (ducts)
➢secretory portion
- glandular cells
- myoepithelial cells
Gll. sudoriferae
SWEAT GLANDS (gll. sudoriferae)
small eccrine
SWEAT – H2O, NaCl2, NH3,
urea, uric acid, proteins
SWEAT GLANDS (gll. sudoriferae)
large apocrine
after puberty complete sweat
– pheromones, fats, steroids;
under hormonal influence
Skin from axilla – great sweat glands (apocrine, aromatic)
Sebaceous glands (HES)
Sebaceous glands (HE)
Mamma non lactans (HE)
Mamma non lactans (HE)
Mamma lactans (HE)
Skin from axilla with hair (HE)
Hair (Pilus)
2 1
3
dermal sheath (1)
outer epithelial sheath (2)
Henle
Huxley
cuticle
of sheath
cuticle
of hair
cortex
medulla
dermal papilla
blood capillaries
inner epithelial sheath (3)
hair
melanocyte
Hair (HEŠ)
Hair – bulbus pili with melanocytes (HE)
Hair – bulbus pili with melanocytes, papilla pili (HES)
Nail - Unguis – Onyx (gr)
Longitudinal section
Cross section
vallum unguis nail plate
sulcus unguis
epidermal bed
dermal bad
bone
Nail - Unguis – Onyx (gr)
INTEGUMENTARY SYSTEM
Slides:
69. Skin from tip of finger
70. Skin from axilla
71. Skin with hair
72. Nail
73. Mamma non-lactans
74. Mamma lactans
Development of epidermis and corium
ectoderm
basal intermediate
layer periderm layer
mesenchyme primitive differentiated
dermis dermis
differentiated
epidermis
Development of sweat glands
epidermis
ectodermal bud
ectodermal peg
development
of lumen
in glandular ducts
convolution
of secretory portion
Development of mammary line and gland
B, C: primary and secondary ectodermal buds
ingrowth mesenchyme
Development of hair and sebaceous gland
peg
bud
hair bulb
hair follicle
hair root
sebaceous gl.
papilla
mesenchyme
epidermis