Staple Tattoo article and keep it 1. Do you know anyone with a tattoo? 1. Do you know anyone with a tattoo? 2. Do you want a tattoo? If so of what? 2. Do you want a tattoo? If so of what? 3. Do you know what safety procedures need to be followed to ensure a safe tattoo? 3. Do you know what safety procedures need to be followed to ensure a safe tattoo?

Skin & Body Membranes Chapter 4a

Body Membranes What is a membrane ? What is a membrane ? –Thin, pliable layer of tissue

Skin and Body Membranes Slide 4.1 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Function of body membranes  Line or cover body surfaces  Protect body surfaces  Lubricate body surfaces

Classification of Body Membranes Slide 4.2 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Epithelial membranes  Cutaneous membrane  Mucous membrane  Serous membrane  Connective tissue membranes

Epithelial Membranes Slide 4.3 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Cutaneous membrane = skin  A dry membrane  Outermost protective boundary  Two layers  Superficial epidermis: Keratinized stratified squamous epithelium  Underlying dermis : Mostly dense connective tissue Figure 4.1a

Epithelial Membranes  Mucous Membranes  Two Layers  Surface epithelium  Underlying loose connective tissue (lamina propria)  Lines all body cavities that open to the exterior body surface  Often adapted for absorption or secretion Figure 4.1b

Epithelial Membranes Slide 4.5  Serous Membranes  Two Layers  Surface simple squamous epithelium  Underlying areolar connective tissue  Lines open body cavities that are closed to the exterior of the body  Serous layers separated by serous fluid

Serous Membranes Slide 4.6 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Specific serous membranes  Peritoneum  Abdominal cavity  Pleura  Around the lungs  Pericardium  Around the heart Figure 4.1d

Connective Tissue Membrane Slide 4.7 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Synovial membrane  Connective tissue only  Lines fibrous capsules surrounding joints Figure 4.2

Quick Quiz What are the three major functions of body membranes? What are the three major functions of body membranes? Where do you find Serous Membranes? Where do you find Serous Membranes? What type of membrane is a Synovial Membrane? What type of membrane is a Synovial Membrane? Give a specific example of where you might find a mucous membrane in the body. Give a specific example of where you might find a mucous membrane in the body.

Integumentary System What do you think Integumentary means? What do you think Integumentary means? “integument” means covering “integument” means covering

Integumentary System Slide 4.8 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Skin (cutaneous membrane)  Skin derivatives  Sweat glands  Oil glands  Hairs  Nails

Skin Functions Slide 4.9a Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Protects deeper tissues from:  Mechanical damage  Chemical damage  Bacterial damage  Thermal damage  Ultraviolet radiation  Desiccation (Drying)

Skin Functions, con’t Slide 4.9b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Aids in heat regulation  Aids in excretion of urea and uric acid  Synthesizes vitamin D

Next time… Detailed structure of the skin Detailed structure of the skin Skin derivatives Skin derivatives

Quick Quiz What is the membrane name for skin? What is the membrane name for skin? Give at least three functions of the skin Give at least three functions of the skin