BIOL 2110K Study Guide - Quiz Guide: Dense Irregular Connective Tissue, Smooth Muscle Tissue, Hair Follicle
Document Summary
Epidermis: superficial layer of skin with 5 layers (come let"s get sun burned) Dermis: under the epidermis with 2 layers; primarily contains collagen, elastic & reticular fibers. Contains hair follicles, blood vessels, smooth muscle, glands, nail roots, nerve endings. Papillary layer: loose/areolar connective tissue, contains blood vessels, dermal papillae, and tactile (meissner) corpuscles (touch receptors) Epithelial: made of keratinized stratified squamous epithelial tissue. 5 layers (superficial to deep): stratum cornium, stratum lucidum (only in thick skin), stratum granulosum, stratum spinosum, stratum basale. Characteristics: types of cells: keratinocytes (most common), langerhans (immune), melanocytes (pigment), tactile (merkel) cells (sn: merkel cells respond to light touch; meissner corpuscles respond to. The hypodermis is the layer under the dermis that isn"t considered part of the skin. Terminal: long, coarse, pigmented hair (ex: head, bear, lashes, legs) Hair bulb: white part on hair; consists of epithelia cells that surround the papilla. Hair root: is the hair under surface of skin where keratinization is still happening.
