Developmental Aspects of Skin and Body Membranes

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Developmental Aspects of Skin and Body Membranes Essentials of Anatomy & Physiology – 6th Edition Page 105 - 107

Lanugo 5th – 6th month of fetal development Downy type of hair Shed by birth

http://www.babylink.info/edinburgh/FAQ/..%5Cimages%5CLanugo1.jpg

vernix caseosa Covers baby’s skin when born White, cheesy-looking substance Produced by sebaceous glands Protects baby’s skin while in the womb

http://www. pregnancy. org/images/pregnancy/pregnancycalendar/mo6500 http://www.pregnancy.org/images/pregnancy/pregnancycalendar/mo6500.jpg

Milia Small white spots on nose and forehead Accumulations in sebaceous glands

http://martinbarron.org/Baby/uploaded_images/Milia-795914.JPG

During old age… Subcutaneous tissues decreases Decrease tolerance for cold bruising Decreased oil production Dry skin Decreased collagen fibers Sagging skin Thinning skin

During old age… Hair loses luster Decrease number of follicles Alopecia (baldness) Tiny and colorless hair (vellus hair) Graying hair Melanin deposits on hair decreases

Premature Hair Loss Anxiety Protein-deficient diets Chemotherapy Excessive vitamin A Fungal disease such as “ringworm”

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