Study Guide Flashcards
Dental Papilla forms which parts of the tooth
Dentin and pulp
Stratum Basale
Single layer of cabodial cells that rests on the basement membrane
Cells divide and form more cells to maintain the supply and replace cells that are lost
Stratum spinosum
Varies in its number of cell rows from two or three to ten or more
Stratum Granulosm
Evident in thick skin
Appears as two or three layers of flattened cells that contain granules or spots within their cytoplasm
Stratum Corneum
Same as the terk keratinized (horn-like) Three situation can be seen here Nonkeratinized Para-keratinized Keratinized
The period of human development we are most interested in and why
3-8 weeks in embryo because features of the face begin to form
What are the parts of a neuron
Cell body
Axon
Dendrite
Mandibular arch
will be the maxillary process and subdivided into the mandibular process and maxillary process
Mandibular process
Will form mandible
Maxillary process
Will form maxillae, zygomatic bones of cheek, and palatine bones
Enamel tufts
Small area of hypo calcified enamel seen at the DEJ
Only found in the histologic section of the tooth
Enamel Lamellae
Cracks in the enamel
Appear as hairline cracks that extend all the way through enamel and into the dentin
Enamel rod
Made of hydroxyapatite crystals and is the primary unit of enamels structure
Enamel spindle
Odontoblastic process
Cellular extension of the odontoblast that becomes trapped between ameloblasts in early development
Cleft lip forms when
Migration fails, resulting in a separation between the medial nasal process and maxillary process (sixth embryonic week)
Dead tracts
Dental tubules that are empty
Sclerotic dentin
Dentinal tubules filled with dentin material
Where are goblet cells located
Respiratory tract
Goblet cells
Secretes mucous substance and lubricates the surface of the epithelium
Granulocytes
Neutrophils, eosinophils, and basophils
Types of simple epithelium
Simple squamous
Simple cubodial or simple columnar
Pseudostratified columnar
What is the fluid part of blood?
Plasma
Hydroxyapatite percentage in bone
50%
Hydroxyapatite percentage in enamel
96%
Hydroxyapatite percentage in
70%
Cells that form the inner lining of blood vessels derive from what kind of cells
Simple squamous
What are the depressions on each side of the nasal spine?
Nasal pits
Retzius
Brownish lines that develop in the enamel (like rings of a tree)
Efferent
(motor) messages leaving the brain to parts of the body and cause action to take place
Red blood cells
4.5 to 5 million per cubic mm
Bi-concave discs
Contain hemoglobin
Hemoglobin
Iron-containing element
Allow the RBC’s to carry oxygen
Pulp stone
Calcifications found in the pulp
Sacromere
Functional unit of skeletal muscle
WBC’s in a cubic millimeter
8,000 to 11,000
Smooth muscle
nonstriated involuntary
Skeletal muscle
striated voluntary
Cardiac muscle
striated involuntary
Epiphysis
two end sections in bone
Diaphysis
Center section in bone
Dental sac
Forms cementum, PDL, and some alveolar bone
Enamel rod
Primary unit for enamels structure
Muscles of mastication
V cranial nerve
Muscles of facial expression
VII cranial nerve
Stylopharyngeus
IX cranial nerve
Muscles of larynx, pharynx, and soft palate
X and XI cranial nerves
Function of the four layers of the enamel organ
Attaching
Enamel formation
Protection
Nourishment