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

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Lanugo

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

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vernix caseosa

• Covers babys skin when born
• White, cheesy-looking substance
• Produced by sebaceous glands
• Protects babys skin while in the womb

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Milia

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

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During old age

• Subcutaneous tissues decreases
• Decrease tolerance for cold
• bruising
• Decreased oil production
• Dry skin
• Decreased collagen fibers
• Sagging skin
• Thinning skin

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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

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Premature Hair Loss

• Anxiety
• Protein-deficient diets
• Chemotherapy
• Excessive vitamin A
• Fungal disease such as ringworm