1. استاد راهنما : خانم دکتر فاطمه پیغمبری
تهیه و تنظیم : مریم السادت اعلازاده - نسیم محمدیان
پزشکی ورودی 93

2. Chapter21: Epithelial system

3. 1)Epidermis 2)Derm 3)Hair 4)sweet gland 5)Mammary gland

5. Epiderm

9. (Harlequin fetus)جنین دلقکی

10. Derm Derm(corium) 1-Lateral plate mesoderm
Abdominal wall and lims derm
2-Paraxial mesoderm
Back region of body derm
3-neural crest cells
Face and neck derm

11. Vernix caseosa consist of 1-sebaceous gland secretions 2- Degenerated epidermal cells 3-hair

12. Hair Formation of hair bud Proliferations of germ native layer
Formation of hair papilla
Invagination of terminal hair bud cells
Formation of hair shaft
Keratinization of central papilla cells
Formation of epithelial hair sheath
Ectodermal source
Formation of dermal root sheath
Mesenchymal source
Formation of erector pili muscle

15. Sweat glands
Sweat glands
Ecrine
Apocrine

16. Sweat glands
Eccrine 1-epidermal source 2-all of body 3- Open to body surface 4-use exocytosis mechanism Apocrine 1-Epidermal source 2-hairy parts of body 3- open to hair follicle 4-form in maturation period 5-secretions include secretory cells

19. Mammery glands Increase in estrogen and progesterone
Changed sweat glands Derive from mammary ridges in 7th week Primary hair bud
Secondary bud(16_24 branches) canalization Lactiferous ducts
Formation of nipple
Formation of Alveolus
Increase in estrogen and progesterone

20. Mammary gland

24. Polythelia & polymastia