Skin and Accessory Organs
A Coggle Diagram about Appendages of the Skin , Dermis; the second major region of the skin, is a strong, flexible connective tissue. Cells are typical of connective tissue proper, fibroblasts, macrophages, mast cells, and scattered white blood cells. Fiber types, collagen, elastic and reticular are also typical. Dermis binds the entire body together like a body stocking. Has two regions, 1. papillary dermis and 2. reticular dermis, Epidermis; keratinized stratified squamous epithelium that contains four distinct types of cells, 1. Keratinocytes, 2. Melanocytes, 3. Tactile epithelial. and Hypodermis; "below the skin", this layer is also called the superficial fascia and the subcutaneous layer. The layer consists of bother areolar and adipose connective tissue, but adipose tissue normally predominates. Besides storing fat, the hypodermis anchors the skin to the underlying structures but loosely enough that skin can slide relatively freely over those structures. Such sliding ensures that many blows just glance off our bodies. The hypodermis is also an insulator, because fat is a poor conductor of heat, it helps prevent heat loss from the body. This layer thickens markedly with weight gain, but this thickening occurs in different body areas in the two sexes.