3 Membranes and the Integumentary System Lesson 3

3 Membranes and the Integumentary System Lesson 3. 1: Body Membranes Lesson 3. 2: The Integumentary System Lesson 3. 3: Injuries and Disorders of the Skin

Chapter 3: Membranes and the Integumentary System Lesson 3. 1 Body Membranes

Body Membranes • Epithelial Membranes – Mucous membranes – Serous membranes – Cutaneous membranes • Connective Tissue Membranes – Synovial membranes © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Epithelial Membranes • Mucous Membranes – Line cavities open to the environment • Serous Membranes – Line cavities not open to environment • Cutaneous Membranes – Form what we know as skin © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Mucous Membranes and Serous Membranes © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Connective Tissue Membranes • Synovial Membrane – Capsule around synovial joint – Tendon sheath – Synovial fluid © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Chapter 3: Membranes and the Integumentary System Lesson 3. 2 The Integumentary System

The Integumentary System • Functions of the integumentary system • Anatomy of the skin • Appendages of the skin © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Functions of the Integumentary System • Protects against: – Abrasion – Chemical damage – Drying out – UV radiation damage • Regulates body temperature © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Functions of the Integumentary System © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Anatomy of the Skin • Epidermis • Dermis • Hypodermis © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Layers of the Epidermis © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Epidermal Cells • Keratinocytes – Produce keratin, form layers of epidermis • Epidermal dendritic cells – Ward off infections • Merkel cells – Touch receptors © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Dermis • Dense, fibrous connective tissue • Papillary layer – Forms fingerprints • Reticular layer © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Hypodermis • Fibrous connective tissue • Adipose tissue – Padding – Insulation – Energy storage © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Appendages of the Skin • Sudoriferous (sweat) Glands – Eccrine – Apocrine • Sebaceous glands • Hair • Nails © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Chapter 3: Membranes and the Integumentary System Lesson 3. 3 Injuries and Disorders of the Skin

Injuries and Disorders of the Skin • Injuries of the skin • Infections of the skin and membranes • Inflammatory conditions of the skin and membranes • Cancers of the skin © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Injuries of the Skin • Decubitus ulcers – Bedsores – Caused by restricted blood supply • Burns – First-, Second- or Third-degree – Caused by heat, chemicals, electricity or UV radiation – Rule of nines © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only. Suzanne Tucker/Shutterstock. com, JTeffects/Shutterstock. com, Naiyyer/Shutterstock. com

Infections of the Skin and Membranes • Viral infections – Herpes varicella – Herpes zoster – Herpes simplex virus type 1 or type 2 – Human papillomavirus • warts Maksym Bondarchuk/Shutterstock. com © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Infections of the Skin and Membranes • Fungal infections – Athlete’s foot – Jock itch – Ringworm – Toenail fungus • Bacterial infections – Impetigo – Cellulitis © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Inflammatory Conditions of the Skin and Membranes • Pleurisy – Makes smooth surface of pleura rough • Peritonitis – Infection of peritoneum Kenxro/Shutterstock. com • Psoriasis – Involves redness and irritation © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Cancers of the Skin • Basal cell carcinoma • Squamous cell carcinoma • Malignant melanoma Librakv/Shutterstock. com – ABCD rule © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.

Review and Assessment True or False? 1. Herpes zoster causes decubitus ulcers. 2. Peritonitis is an infection of the skin. 3. Impetigo is caused by a fungus. 4. Warts are caused by a virus. 5. Ringworm is caused by a fungus. © Goodheart-Willcox Co. , Inc. Permission granted to reproduce for educational use only.