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DHYG341-34

Dental Embryology Terminology

TermDefinition
Tissues from Ectoderm Outer layer Forms: CNS Lens of the eye Sensory Epithelium of eye, ear, nose Epidermis, hair, nails Epithelium of oral and nasal cavities Tooth Enamel Neural Tube (becomes brain and spinal cord)
Tissues from Endoderm Internal layer Forms 1. epithelial lining the inside of the digestive tube except part of the mouth and pharynx 2. lining cells of all the glands which open into the digestive tract including liver and pancreas.
Tissues from Mesoderm Middle layer Forms: 1. Cardiac, skeletal and smooth muscle 2. Bone, cartilage 3. Lymph cells, blood 4. Dentin, pulp, cementum, periodontal ligament
Apoptosis Programmed cell death 1. fragmentation of a cell into membrane bound particles 2. eliminated by phagocytosis by specialized cells. 3. Accompanies embryonic growth & differentiation
Trilaminar Disc Embryo at the end of the third week of gestation that has three different germ layers - the ectoderm, the mesoderm and the endoderm. (Forms gastrulation)
Created by: Alex_Kim
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