3.2 Integumentary System

​Ch 3 Integumentary

• 3.1 Membranes

• 3.2 Integumentary System

• 3.3 Diseases/Disorders/Unique Conditions

​3.2 Integumentary​

System ​

​Integumentary Function

• ​Protection from

  • ​Abrasions

  • ​Chemical damage

  • ​Dehydration

  • ​UV damage

• ​Temperature regulation

• ​Water Barrier

• ​Vitamin D Production

• ​Waste elimination

• Sensory Perception​

Multiple Choice

Which of the following is NOT a function of the Integumentary System?

• Provides Protection

• Circulates Blood

• Maintain body temperature

• Helps us feel

Multiple Choice

Which image represents epithelial tissue?

​Protection

• ​Keratinocytes

  • ​build fibrous proteins that form a protective layer against mechanical stress

  • ​prevent water loss

• Melanocytes​

  • Prevent damage from UV radiations ​

Multiple Select

The Epidermis houses which of the following structures…

(Multiple Answers)

• Columnar Epithelial Cells

• Keratinocytes

• Melanocytes

• Capillaries

​Temperature Regulation and Waste Removal

• ​Capillaries

  • ​contract to conserve body heat

  • ​dilate to release heat

• ​Exocrine glands

  • ​release sweat to cause evaporative cooling

  • ​sweating rids the body of Urea and Uric acids

Multiple Choice

In a cold environment, what happens to your blood vessels

• they constrict

• they dilate

• they do nothing, they have nothing to do with temperature

• they bring more melanin to the surface of the skin

Multiple Choice

If you want to lower your body temperature, which is your best option

• constrict your blood vessels

• create more melanin

• create more keratin

• sweat

Sensory and ​Other Awesome Skin Stuff

• ​Receptor cells

  • ​Pacinian cells

    • pressure/vibration

  • ​Free Nerve endings

    • temperature

  • nociceptors​

    • pain

  • Meissner's corpuscle​

    • ​touch

  • Merkel disks

    • light touch

Sensory and ​Other Awesome Skin Stuff

• ​Cholesterol conversion

  • ​sunlight converts modified cholesterol into Vitamin D

Multiple Choice

The function of the integumentary system includes all of these except what?

• Homeostasis

• Cooling system

• Synthesis of Vitamin A

• Excretion of wastes

​Skin Anatomy

• ​Epidermis

• ​Dermis

• ​Hypodermis

​Epidermis Layers

• ​

Epidermal Cells​

• ​Keratinocytes

  • ​produce keratin forming layers of the epidermis

• ​Epidermal dendritic cells

  • Langerhans cells

    • ​infection prevention

• ​Merkel Cells

  • ​touch receptors

Multiple Choice

The waterproofing protein that fills the cells in the upper layers of the epidermis.

• Keratin

• Melatonin

• Melanin

• Actin

​Epidermal Layers

• ​Stratum Basal

  • ​mitosis of a single layer cuboidal keratin producing stem cells

• ​Stratum Spinosum

  • ​stratified keratinocytes

    • bound by tight junctions and desmosomes​

​Epidermal Layers

• ​Stratum Granulosum

  • ​Keratohyalin granules

    • ​crosslinking keratin filaments

    • ​coarse surface

• ​Stratum Lucidum

  • ​thick skin only

  • ​densely packed keratinocytes and clear protein eleidin

​Epidermal Layers

• ​Stratum corneum

  • ​up to 30 layer of dead keratinized cells

  • ​durable surface protection from

    • ​abrasions

    • ​water loss

​Dead skin and Dust Mites

• ​Dust

  • ​mostly dead human skin

• ​Dermatophagoides

  • ​dust mites

    • ​thrive in humid areas

    • ​feed on dead skin cells

• ​Dust allergy

  • ​dust mite feces

Multiple Choice

Which type of cell found in the epidermis is responsible for immune activity and eats up foreign cells?

• adipose tissue

• keratinocytes

• Langerhans cells

• melanocytes

• Merkel cells

​Dermis

• Dense fibrous connective tissue​

• ​Papillary

  • ​Areolar loose CTP

  • ​Finger prints

• ​Reticular Layer

  • ​Irregular dense CTP

  • ​deepest layer of the skin

​Hypodermis

• ​Fibrous connect tissue

  • ​adipose

• ​Larger blood vessels

• ​Macrophages

  • ​Large white blood cells

Multiple Choice

Tissue that makes up the hypodermis.

• Subcutaneous Layer

• Adipose Tissue

• Insulation

• Anchoring

• Shock Absorption

Multiple Choice

Which layer of the dermis contains pain and touch receptors and epidermal ridges?

• papillary

• reticular

• collagen

• adipose