7 Epithelial Membranes Mucous Membranes (mucosa) Epithelium that rests on loose connective tissue.Membrane lines all body cavities that open to the exterior.All wet membranesAdapted for secretion and absorptionEX: lungs, mouth, esophagus, stomach, urinary tract
9 Epithelial Membranes Serous Membrane (serosa) Layer of simple squamous with an under layer of areolar connective tissue.Serosa line body cavities not open to the exterior.Membranes occur in pairs:Parietal- outer layer of the membraneVisceral- inside portion that covers the organ
10 Epithelial Membranes Serous Membrane (serosa) The parietal serosa and visceral serosa are separated by a thin clear fluid called serous fluid.Peritoneum- serous membrane in the abdominal cavity.Pleura- membrane surrounding the lungs.Pericardium- membrane surrounding the heart.
14 Assignment Textbook page 112 Questions 1-3 Answers written in complete sentences.
15 Body Membranes #2Explain the difference between the parietal serosa and the visceral serosa.What are the three types of epithelial membranes?Explain the functions of the cutaneous, mucous, and serous membranes.
16 Integumentary SystemIntegumentary system includes your skin (cutaneous membrane) and associated organs such as sweat glands, hair follicles, and etc..
17 Integumentary System Functions: Protects the internal body from external material.Insulates and cushions the body.Assists to regulate body temperature.
19 Integumentary System Structure of the Skin Epidermis Dermis Hypodermis Most outer layer of the skinMade of stratified squamous epitheliumComposed of a tough structural protein called Keratin.DermisLayer underneath the epidermis, made of connective tissue.HypodermisAdipose tissue that connects skin to the underlying organs.
20 Structure of the Skin- Epidermis Stratum corneum- dead cells filled with keratin and is cells thick.Stratum lucidum-only present in hairless, extra thick skin.Stratum granulosumStratum spinosumStratum basale- produces new skin cells and location of melanocytes.
22 Structure of the Skin- Epidermis MelanocytesFound in the stratum basale.Produce a protein called melanin.Melanin is a color pigment that ranges from yellow to black.Melanin shields the nucleus from damaging UV rays.
23 Structure of the Skin- Dermis Composed primarily of collagen and elastic fibers that provide toughness and flexibility.
24 Structure of the Skin Sebaceous (oil) Glands: Exocrine gland that secretes sebum through ducts to the skin surface.Sebum keeps the skin soft and kills foreign bacteria.Not found on palms of hands and feet.
25 Structure of the SkinSweat Gland- assist in thermoregulation of the body.Hair- serve as protection and insulation.Hair Follicle- manufactures hair.Arrector Pili- smooth muscle that pushes hair upright.Nails- scale like dead keratinized cells.
27 Body Membranes #3 Explain the function of the Integumentary system. Which layer of the epidermis produces new cells?Which layer of the epidermis is present and very thick on the bottom of feet?
28 Homeostatic Imbalances of the Skin Whitehead- occurs when an oil gland is blocked by sebum.Blackhead- occurs when the sebum in the whitehead oxidizes and dries out.Acne- occurs from an active infection of the sebaceous gland.Seborrhea- over active oil glands that cause raised lesions on the skin.
30 Homeostatic Imbalances of Skin Athlete’s Foot- caused by a fungus infection between the toes indicated by red, itchy, and burning sensation.Boils- inflammation of hair follicles and subcutaneous glands.Cold Sores- caused by the herpes simplex virus and usually occur around the mouth.
32 Homeostatic Imbalances of Skin Contact Dermatitis- Allergic response to exposure to chemicals such as from poison ivy indicated by redness, itchiness, swelling, and blisters.Impetigo- staphylococcus infection around the mouth.Psoriasis- chronic condition caused by overproduction of skin cells.
34 Homeostatic Imbalances of Skin Burns1st Degree- only the epidermis is damaged2nd Degree- epidermis and upper dermis are damaged usually have blisters3rd Degree- the full thickness of the skin is damaged beyond repair.
36 Homeostatic Imbalances of Skin Skin CancerOpen Textbook to page 102Benign neoplasms that do not spread.Malignant neoplasms that spread to other body parts.
37 Homeostatic Imbalances of Skin Skin CancerBasal Cell Carcinoma- most common and least malignant skin cancer.Squamous Cell Carcinoma- rapidly spreading cancer that appears to look like a skin ulcer.Malignant Melanoma- cancer of the melanocytes and is extremely deadly.