The Integumentary System 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
Functions of the Integumentary System protects against abrasion chemical damage drying out UV radiation damage regulates body temperature
Functions of the Integumentary System
Anatomy of the Skin epidermis dermis hypodermis
Layers of the Epidermis
Epidermal Cells keratinocytes produce keratin, form layers of epidermis epidermal dendritic cells (Langerhans cells) ward off infections Merkel cells touch receptors Melanocytes produce melanin
Dermis dense irregular fibrous connective tissue papillary layer forms fingerprints reticular layer
Hypodermis fibrous connective tissue adipose tissue padding insulation energy storage
Appendages of the Skin sudoriferous (sweat) glands sebaceous glands eccrine apocrine sebaceous glands hair nails
Review Questions
The two layers of the dermis are the ______________ layer and the reticular layer.
The outermost layer of the epidermis is the _____________.
The ________________ layer of the epidermis contains melanocytes.
Beginning at the stratum basale and moving up the next layer of the epidermis is the ____. A. stratum spinosum B. stratum granulosum C. stratum lucidum D. stratum corneum
Which of the following produce a pigment that acts as sunscreen. A Which of the following produce a pigment that acts as sunscreen? A. Merkel cells B. epidermal dendritic cells C. keratinocytes D. melanocytes
The fingerprints are derived from patterns in the ____. A The fingerprints are derived from patterns in the ____. A. reticular layer B. papillary layer C. hypodermal layer D. melanin layer
The ____ is found only on the palms, soles, fingers and toes. A The ____ is found only on the palms, soles, fingers and toes. A. stratum corneum B. stratum lucidum C. stratum granulosum D. stratum basale
Merkel cells function as ____. A. sweat glands B Merkel cells function as ____. A. sweat glands B. infection preventers C. touch receptors D. sunscreen
Injuries and Disorders of the Skin 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
Injuries of the Skin decubitus ulcers burns bedsores caused by restricted blood supply burns first-, second- or third-degree caused by heat, chemicals, electricity or UV radiation rule of nines Suzanne Tucker/Shutterstock.com, JTeffects/Shutterstock.com, Naiyyer/Shutterstock.com
Rule of Nines
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
Infections of the Skin and Membranes fungal infections (tinea) athlete’s foot jock itch ringworm toenail fungus bacterial infections impetigo cellulitis
Inflammatory Condition of the Skin psoriasis involves redness and irritation Kenxro/Shutterstock.com
Cancers of the Skin basal cell carcinoma squamous cell carcinoma malignant melanoma ABCD rule Librakv/Shutterstock.com