tailieunhanh - Ebook Histology at a glance: Part 2

(BQ) Part 2 book "Histology at a glance" presents the following contents: Oral tissues, general features and the esophagus, stomach, small intestine, large intestine and appendix, digestive glands; bronchi, bronchioles and the respiratory portion of the lungs; female genital tract and mammary glands, thymus and lymph nodes,. | Hair sebaceous glands and nails a Hair follicles and sebaceous glands Sebaceous gland Opening of gland onto hair shaft Epidermis Remnants of hair shaft Arector pili muscle A External root sheath of hair follicle B Hair root bulb Adipose tissue c Sebaceous gland Release of sebum onto hair shaft Sebum producing cells Basal cells Smooth muscle arector pili Paler stained rupturing cells Sebaceous gland e Cross-section through the nail b Sections through the hair TS of hair at A Hair cortex Hair cuticle External root sheath 500 m 1ơờgm Connective tissue sheath 100 m Glassy basement membrane External root sheath Internal root sheath Medulla Cortex Cuticle Connective tissue sheath The medulla cortex and cuticle make up the hair shaft. The hair follicle is made up of the internal and external root sheaths epidermal layers LS of hair bulb at B Peripheral cells in the hair matrix of the hair bulb form internal and external root sheaths hair and sebaceous glands 50 m Dermal papilla contains dermal fibroblasts d Diagram of the nail Eponychium cuticle - Proximal nail fold Nail root- Phalanx bone _____ f Sagittal view of nail Proximal nail fold covered by eponchymium epidermis Nail root Dermis Fibrous periosteum Phalanx Lunula Nail plate Nail bed nail removed 500 m Nail bed Free edge of nail Hyponcychium tight connection between nail bed and nail plate Dermis Epidermis Hyponychium Epidermis 52 Histology at a Glance 1st edition. Michelle Peckham. Published 2011 by Blackwell Publishing Ltd. Hair Hairs Fig. 22a b are made up of hair follicles and hair shafts. The hair shaft is made up of columns of dead keratinized cells hard keratin organized into three layers Fig. 22b a central medulla or core not seen in fine hairs a keratinized cortex a thin hard outer cuticle which is highly keratinized. Hair follicles are tubular invaginations of the epidermis which develop as downgrowths of the epidermis into the dermis. The hair follicle contains the following. An external root sheath ERS .