Diagrams |
Explanations |
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Diagram of the skin and hair (includes sweat gland)
Skin: Tissue creating an external covering of the body.
Epidermis: The upper layer of skin composed of the Stratum Corneum, stratum Lucidum, Stratum Granulosum, Stratum Spinosum, and Stratum Germinativum. The Stratum Corneum: The outermost layer of skin consisting of dead and Keratinization cells. Used as a barrier for light, heat, chemicals and micro-organisms. Found in the Epidermis. The Stratum Lucidum: The layer under the Stratum Corneum in the Epidermis in the skin of palms and soles. The stratum Granulosum: Found in the Epidermis. Contains cells that die and move to the surface. Stratum Spinosum: Found in the Epidermis. Contains spiny-shaped cells Stratum Basale: The deepest layer in the Epidermis. Contains a continuous layer of cells. Dermis: The lower layer of skin composed of the papillary layer and reticular layer. Papillary Layer: Is composed of collagen fibers. Is located in the dermis. Reticular Layer: Is composed of dense connective tissue and collagen fibers. Hypodermis: A layer mainly used to store fat. Eccrine Sweat Gland: The major sweat gland in the human body. Adipose Tissue: One of the main connective tissue. Vein: Tubes carrying blood. Artery: Tubes carrying blood from the heart to other parts of the body. Free nerve ending: Brings information from the body's periphery towards the brain. Sensory nerve fibers: A nerve that passes impulses to the central nervous system. Meissner's Corpuscle: A sensory nerve ending in the dermis. Root Hair Plexus: Sends nervous impulses to the brain when the hair moves.
Pacinian Corpuscle: Acts as a receptor for pressure and vibration. Hair root: Part of the hair that is embedded in the hair follicle. Hair follicle: Cells and connective tissue that surrounds the root of the hair. Arrector Pili Muscle: Small muscles attached to hair follicles. When these muscles contract is uses you hair to stand on end. ( goose bumps) Sabaceous Gland: A small gland that creates a oily matter into the hair follicle. Dermal Papillae: Contains blood vessels that nourish the hair follicles. Argan stem cells: Used to delay depletion of the Dermal Papillae. Hair Shaft: Portion of hair that does not grow. |
Diagram of the nail
Nail: The protective covering of the finger.
Nail Matrix: The area where the nail rests. Root of the Nail: The end of the nail under the proximal nail fold. Proximal Nail Fold: Fold of soft tissue. Eponychium: Layer of skin surrounding the nail. Body of the Nail: The exposed portion of the nail distal to it's root. Nail Bed: A layer of cells underlying the nail. Free Edge of Nail: Edge of nail that protects the body of the nail. Hyponychium: A layer of Epidermis under free edge of nail. Phalanx: Bone in finger or toe. |