Skin and Body Membranes

I. BODY MEMBRANES-- less complicated than organs - Body Membranes are generally located where? A. Mucous Membranes *Tissues made of are? 2. *Produce what substance? Why? 3. *Where located?

B. Serous Membranes 1. *Tissue made of? 2. *Substance produced? 3. *Where located? 4. Specific types Peritoneum: Pleura: Pericardium: 5. They have two layers Visceral Parietal

II) INTEGUMENTARY SYSTEM A. Functions: see Table 4.1 B. Structure & Major Layers: *Epidermis define *Dermis define *Below Skin = Subcutaneous (Hypodermis) define

C. Epidermis– Sub-Layers Figure 4.3

C. EPIDERMIS *Type of Tissue: 2. Sub-Layers a. Stratum Basale ("germinativum) i) *Location & # layers ii) Cells it Contains: Keratinocytes & Function Melanocytes & Function iii) * Importance = Mitosis explain EPIDERMIS Stratum Basale

*Contains what chemicals? Condition of cells? b) Stratum Spinosum c) Stratum Granulosum *Has what structures? *Contains what chemicals? Condition of cells? d) Stratum Lucidum Cells Dead *Location: only where? Appearance of layer Stratum Granulosum Stratum Spinosum

d) Stratum Corneum- *Location? *# layers: Condition of Cells? Epidermis … d) Stratum Corneum- *Location? *# layers: Condition of Cells? Cells are filled with: *Function Stratum Corneum

D. DERMIS– Bottom Layer 1. *Major Type Tissue Fibers: Many Blood vessels Function in: 2. Two sub-layers DERMIS

D. Dermis … 2. Layers of the Dermis … a) Papillary layer Location: Tissue: Areolar pain receptors touch receptors Papillary Layer Touch Receptors Pain Receptors

Dense Connective Tissue Blood vessels *Sweat produce? b) Reticular layer Dense Connective Tissue Blood vessels *Sweat produce? *Oil (Sebaceous) glands produce? *Deep pressure receptors function? Sweat Gland Oil Gland Deep Pressure Receptor

E. SUBCUTANEOUS TISSUE– HYPODERMIS Function: Tissue:

F. SKIN APPENDAGES 1. Sebaceous glands *Locations *Ducts empty into what? Functions 2. Eccrine Sweat glands Composition of Sweat *Functions Sweat Gland

3. Hair Parts: Bulb, Root, Shaft Hair follicle Matrix Color

G. Skin Homeostatic Imbalances … 1. Burns b) Types– Severity of Burns i) First-degree burns *layers: Condition of Skin ii) Second-degree burns *layers

iii) Third-degree burns *layers Characteristics c. Critical Burns i) Second-Degree Amount: over 25% body ii) Third-Degree Amount: over 10% body AND/OR: includes: Face, Hands, and Feet d. Dangers of Critical Burns: dehydration electrolyte imbalance shock

2. Skin Cancer Basal Cell Carcinoma *Malignancy Cure Rate *Cause: Skin layer Characteristics ii) Squamous Cell Carcinoma

iii) Malignant melanoma Cure Rate Cell layer and cells *Cause Metastasizes *Characteristic– color Detection: ABCDE Rule A = Asymmetry B = Border C = Color D = Diameter > 6 mm E = Elevation

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