Integumentary System
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Created by:
Grayses_momma615 on June 14, 2012
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16 terms
Terms | Definitions |
|---|---|
 Define skin and its function | Weighs more than 20 pounds Covers 16% of the body Purposes: - protection - regulate temperature - absorption - house nerve receptors - secrete fluids |
| What are the skin layers? | Epidermis Dermis Subcutaneous Tissue |
| Name the layers of the epidermis layer | Stratum corneum Stratum lucidum Stratum granulosum Stratum germinativum |
| In what epidermis stratum are the dead cells? | Stratum corneum and lucidum |
| In what epidermis stratum are the melanocytes? | Stratum germinativum |
| In what layer of the skin are cells capable of mitosis and cell division? | Stratum germinativum |
| What is the dermis composed of? | Middle layer of skin Composed of: - connective tissue containing nerves and nerve endings - blood vessels - sebaceous and sweat glands - hair follicles - lymph vessels Further divided into two layers: - papillary layer - reticular layer |
| What is the composition of the subcutaneous or hypodermis? | Composed of subcutaneous tissue Tissue helps support, nourish, insulate, and cushion the skin |
| Name the skin accessory organs | Hair Nails Sebaceous glands Sweat glands |
| Describe the nail characteristics and name the nail proteins | Nails -flat platesnof keratin. - called nail body - cover ends of tissue by nail bed - connected to fingers and toes. - grow longer from the roots - covered and protected by cuticle - free edge is exposed edge - light colored half-moon area at the base is the lunula |
| Name the hair parts and name the proteins that the hair fibersnare composed of | Hair - hair follicles. - hair root - hair shaft. - fibers composed of the protein keratin - hair formation like - melanin gives hair its color - sebaceous glands |
| What gives hair its color? | Melanin |
| What is released from the sebaceous gland into the follicle? | Sebum |
| Where are the sensory receptors and what do they detect? | Located in the dermis They detect pressue, traction, heat, cold, and pain |
| Define melanocytes. What do they produce? | Melanocytes are cells that produce melanin for pigmentation. |
| What is the most common type of skin cancer and how can we prevent skin cancer? | Basal Cell Carcinoma To prevent skin cancer, wear proper clothing, use proper protection |
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