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Published byMatilda Stafford
Modified over 5 years ago
all exocrine glands (secretions via ducts) Sebaceous glands Sweat glands Hair/hair follicles Nails © 2015 Pearson Education, Inc.
Dermal papillae Hair shaft Pore Appendages of skin Eccrine sweat gland Arrector pili muscle Sebaceous (oil) gland Hair follicle Hair root Cutaneous vascular plexus Adipose tissue Epidermis Dermis Papillary layer Reticular layer Hypodermis (subcutaneous tissue) Nervous structures Sensory nerve fiber Lamellar corpuscle Hair follicle receptor (root hair plexus)
Produce sebum (oil) which: Lubricates skin/ slows water loss Prevents brittle hair Kills bacteria Highly active at puberty © 2015 Pearson Education, Inc.
Eccrine gland Sebaceous gland Sweat pore Sebaceous gland duct Dermal connective tissue Hair in hair follicle Secretory cells (a) Photomicrograph of a sectioned sebaceous gland (100 × )
Two types: Eccrine glands Produce sweat through pores all over skin surface Sweat has salts, Vit. C, excretory wastes (uric acid) Apocrine glands Ducts empty into hair follicles Activated at puberty; found in armpit and genital areas Sweat that also contains fatty acids and proteins (milky or yellowish color) Bacteria like this stuff – they create body odor when they use it © 2015 Pearson Education, Inc.
Eccrine gland Sebaceous gland Sweat pore Dermal connective tissue Eccrine gland duct Secretory cells (b) Photomicrograph of a sectioned eccrine gland (205 × )
Produced by hair follicle Outer tissue= connective Inner= epithelial Root is enclosed in the follicle Shaft (dead part) projects from surface of scalp or skin Consists of hard keratinized epithelial cells Melanocytes provide pigment for hair color Hair grows from hair bulb in stratum basale © 2015 Pearson Education, Inc.
Hair follicle (c) Fibrous sheath Epithelial sheath Hair matrix (growth zone) in hair bulb Melanocyte Subcutaneous adipose tissue Hair papilla containing blood vessels
Arrector pili muscle Smooth muscle tissue Pulls hairs upright when person is cold or frightened (gives us goosebumps) You could consider this a vestigial structure- it has lost all of its function/use for humans © 2015 Pearson Education, Inc.
Heavily keratinized = very hard Stratum basale is responsible for growth Lack of pigment makes them colorless Growth is similar to that of hair Functions: Protection Tools Scratch an itch! © 2015 Pearson Education, Inc.
Skin Appendages These appendages come from the epidermis and help maintain the body’s homeostasis. Cutaneous (relating to skin) glands Sebaceous glands.
MEMBRANES & INTEGUMENTARY SYSTEM. MEMBRANES Cover surfaces, organs Line body cavities Protect, lubricate Two categories -Epithelial tissue membranes -Connective.
The Integumentary System $100 $200 $300 $400 $500 $100$100$100 $200 $300 $400 $500 Epidermis FINAL ROUND Dermis Hair and Nails Glands Grab Bag.
Dermis & Accessory Structures (Hair, Glands, Nails)
Skin and Somatic Receptors. Epidermis Epidermal Layers Stratum Corneum Stratum Lucidum Stratum Granulosum Stratum Spinosum Stratum Basale (Melanin.
Lab #7 Integumentary System. Overview of the Integumentary System.
SKIN APPENDAGES: HAIR, NAILS, GLANDS September
Anatomy & Physiology Integumentary System. Largest system in the body Largest organ in the body System includes skin, glands, blood vessels, nerves, hair,
Accessory Structures of the Skin (a.k.a. Skin Appendages)
Integumentary System Review
The Integumentary System
The Integumentary System 1. Protection Excretion Temperature maintenance Insulation and cushion Vitamin D3 synthesis Sensory detection Integumentary system.
• Hair follicle receptor (root hair plexus) Adipose tissue
The Integumentary System Chapter 6. Integumentary System Structure –Epidermis –Dermis –Hypodermis Functions of the skin.
Dermis And Accessory Structures. Majority of cells are keratinocytes “Ashiness” is caused by this layer of dead skin cells being very rough and raggedy.
THE DERMIS Pages Dermis is made of dense connective tissue Varies in thickness throughout the body Has two layers: ◦ Papillary ◦ Reticular.
Skin Structure Figure 4.4.
PowerPoint ® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Copyright © 2009 Pearson Education, Inc., publishing.
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