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A&P Vocab #4
A&P Vocab #4 - Lesson 3.2 The Integumentary System and 3.3 (first part)
| Term | Definition |
|---|---|
| dermis | The second layer of skin which includes blood vessels, nerves, and various structures including, but not limited to sweat glands and hair follicles. |
| epidermal dendritic cells | Specialized cells associated with the immune and nervous systems and respond to the presence of bacteria or viruses. |
| epidermis | The first layer of skin which has multiple layers of keratin cells which vary in viability from deep to superficial. |
| hypodermis | Also known as the subcutaneous fascia, this layer of primarily adipose tissue and fibrous connective tissue is found below the dermis. |
| integumentary system | The body system which includes the skin and its appendages (nails and hair), |
| keratin | A tough protein found in the skin, hair and nails that helps provide structure to the integumentary system. |
| keratinocytes, | Cells which are mostly found in the epidermis that produce keratin, the tough fiber found in skin, hair, and nails. |
| melanin | A pigment that protects the body from ultraviolet rays from the Sun. |
| melanocytes | Specialized cells in the skin which produce melanin. |
| Merkel cells | These cells are located in the stratum basale which function as touch receptors. |
| papillary layer | The outer layer of the dermis. |
| reticular layer | Located below the papillary layer. |
| sebaceous glands | Located all over the body EXCEPT for the palms of the hands and soles of the feet which produce an oily substance called sebum. |
| sebum | Oily substance produced by the sebaceous glands. It is most composed of triglycerides and fatty acids. |
| stratum basale | The basement layer of keratinocytes which are the most viable and which provide nutrients to the non-viable keratinocytes. It also contain melanocytes. |
| stratum corneum | The superficial layer of keratinized cells that we normal refer to as "the skin". |
| stratum granulosum | The layer of skin that has small granules in it. |
| stratum lucidum, | The layer of skin only found on the soles of the feet and the palms of the hand. |
| stratum spinosum | This layer is found in in between the stratum basale and the stratum granulosum. |
| sudoriferous glands | The medical term for "sweat glands", which are found throughout the dermis of the body and especially in the underarms, soles of the feet, and palms. |
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Mr. Bryant
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