S K I N Flashcards
Basic tissue types (4)
Epithelial tissue
Connective tissue
Muscle tissue
Nervous tissue
Epithelia tissue
Covers surfaces, lines cavities, and forms glands
Connective tissue
Most abundant primary tissue in the body, connects different tissues, provides a framework, resist pulling forces and protects other tissue
Muscle tissue
Causes movement
Nervous tissue
Received and generated nerve impulses
Organs
Formed from two or more different tissues working together to perform a specific function
Layers of the skin (3)
Epidermis, dermis and hypodermis
Epidermis
Outer most layer of the skin, waterproof barrier that protects your body for external factors, constantly shedding old skin cells and replacing new ones
Dermis
Middle layer of the skin, contains blood vessels, nerves, hair follicles, and sweat glands. Responsible for giving your skin its strength and elasticity
Hypodermis
Deepest layer that contains fat and connective tissue. Insulates your body and protects your muscle and bones
Skin cells (4)
Keratinocytes, melanocytes, langerhan cells, Markel cells
Keratinocytes
Most common skin cell, make up 90% of epidermis.
Produce keratin, tough protein that gives skin its strength and flexibility, start at deepest layer and gradually move to the surface
Melanocytes
Cells produce melanin, pigment that gives skin its color. Also protects skin from harmful effects of UV light
Langerhans cells
Immune cells that help protect the skin from infection, they recognize and destroy foreign invaders, such as bacteria and viruses
Merkel cells
Specialized cells that are involved in the sense of touch, they are located in the deepest layer of the epidermis and are thought to be connected to nerve endings
