ANAT 1010 Chapter Notes - Chapter 5: Stratum Corneum, Stratum Granulosum, Stratum Spinosum
10 Dec 2017
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Document Summary
The integumentary system includes the skin and its derivatives including hair, nails and glands. The skin is composed of several layers and is one of the largest organs in the body. The skin consists of two main layers: outer, thinner layer called the epidermis. Beneath the dermis is a subcutaneous layer or hypodermis which attaches the skin to the underlying tissues and organs. Connective tissue layer composed of collagen & elastic fibers, fibroblasts, macrophages and fat cells. Contains hair follicles, glands, nerves and blood vessels. The subcutaneous layer is located below the dermis, containing connective tissue (fat tissue), nerve and blood supply. Epidermal derivatives are organs that develop from the embryonic epidermis. These organs include: hair, skin glands, and nails. Shaft visible: consists of 3 parts: medulla, cortex, and cuticle. Follicle surrounds root: external root sheath. Internal root sheath: base of follicle is bulb, bloods vessels, germinal cell layer.
