Figure 6.1 Transparency Master 37

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1 Pore Hair shaft Epidermis Dermal papillae (papillary layer of dermis) Meissner s corpuscle Dermis Free nerve ending Reticular layer of dermis Sebaceous (oil) gland Arrector pili muscle Sensory nerve fiber Pacinian corpuscle Hypodermis or subcutis Vein Artery Eccrine sweat gland Hair root Hair follicle Root hair plexus Adipose tissue Figure 6.1 Transparency Master 37

2 Keratinocytes Langerhans cell Desmosomes lucidum corneum granulosum Cells are dead; represented only by flat membranous sacs filled with keratin. Glycolipids in extracellular space. Cells are flattened; organelles deteriorating; cytoplasm full of lamellated granules (release lipids) and keratohyaline granules. Epidermis spinosum Cells contain thick bundles of intermediate filaments made of prekeratin. basale Cells are actively mitotic stem cells; some newly formed cells become part of the more superficial layers. Dermis Dermis Merkel cell Melanocytes Sensory nerve ending Melanin granules Figure 6.2 Transparency Master 38

3 lucidum corneum granulosum spinosum Epidermal peg 90 basale Dermal papilla Basement membrane Figure 6.3 Transparency Master 39

4 Epidermis Papillary layer Dermis Reticular layer Subcutis Figure 6.4 Transparency Master 40

5 Connective tissue root sheath Follicle wall Cuticle Medulla Cortex Internal root sheath External root sheath Glassy membrane Figure 6.6 Transparency Master 41

6 Hair shaft (cuticle, cortex, medulla) Cuticle Internal root sheath External root sheath Glassy membrane Medulla Connective tissue sheath of hair follicle Cortex Matrix Melanocyte Hair shaft Arrector pili Sebaceous gland Hair root Hair bulb in follicle Hair papilla Subcutaneous adipose tissue Figure 6.7 Transparency Master 42

7 Polygonal plaque Groove separating plaques Planum nasale Nostril corneum Surface groove Epidermis Dermis Dermal papilla Epidermal peg Figure 6.8 Transparency Master 43

8 corneum Epidermis of papilla Carpal pad Dermis of footpad Metacarpal pad Sweat glands Digital pad Claw Conical papilla Figure 6.9 Transparency Master 44

9 Second phalanx Corium or quick Third phalanx Claw (cornified epidermis) Unguicular process Figure 6.10 Transparency Master 45

10 corneum of cornual epidermis (cornified horn) Corium corneum Epidermis Dermis Frontal sinus Cornual (horn) process of frontal bone Figure 6.12 Transparency Master 46

11 Periople Coronet Papillae of coronary corium covered by coronary epidermis Tubular and intertubular horn of the stratum medium of the hoof wall Laminar corium Interdigitation of corial and epidermal laminae (stratum internum) medium Figure 6.13 Transparency Master 47

12 Toe White line Quarters Heel Apex of the frog Sole Bars Angle of the sole Central sulcus of the frog Frog Bulbs of the heel Angle of the wall Collateral sulcus or commissures Groove for coronary band Perioplic ring Horny laminae Upper surface of bars Frog stay Figure 6.14 Transparency Master 48

13 Superficial digital tendon Long pastern bone Fetlock joint Short pastern bone Ergot Coffin joint Horny laminae Sensitive laminae Common digital extensor tendon Perioplic corium Periople Coronary corium or coronary band Extensor process of coffin bone Wall of hoof Junction of sensitive sole and sensitive laminae White line Sole Coffin bone Sensitive sole Superficial sesamoidean ligament Pastern joint Deep digital flexor tendon Suspensory ligament of navicular bone Navicular bone Navicular bursae Digital cushion Sensitive frog Figure 6.15 Transparency Master 49

14 Perioplic corium Coronary corium Laminar corium Solar corium Perioplic sulcus Coronary sulcus medium of the hoof wall Corium of the frog Epidermal laminae Frog stay Internal surface of the sole Figure 6.16 Transparency Master 50

15 Tubular cornified wall Secondary lamina Primary lamina of laminar corium medium internum of hoof wall Figure 6.17 Transparency Master 51

16 Alveoli Lobule Lobe Intralobular duct or alveolar duct Interlobular duct Intralobar duct Interlobar duct Udder cistern or lactiferous sinus Teat cistern Streak canal or lactiferous duct Figure 6.18 Transparency Master 52