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H&N UNIT 1
OROFACIAL EMBRYOLOGY PART ONE
| Question | Answer |
|---|---|
| AKA BRANCHIAL ARCH II | HYOID |
| TOTH TISSUE DERIVED F ROM ECTODERM | ENAMEL |
| MOST SENSITIVE HUMAN DEV STAGE | EMBRYONIC (3-8WK) |
| DEV STAGE WHERE MATURATION OCCURS | FETAL (8WK-9MO) |
| GERM LAYER THAT CONTRIBUTES TO NERVOUS SYSTEM | ECTODERM |
| CONTR TO MALFORMATION DURING DIFFERENTIATIONAL STAGE OF DEV | TERATROGENS |
| CELLS THAT DIFFERENCIATE INTO EPIBLASTS AND HYPOBLASTS | EMBRYOBLASTS |
| GERM LAYER THAT MAKES UP POSTERIOR 1/3 OF TONGUE | ENDODERM |
| MIDDLE GERM LAYER THAT MAKES CONN TISSUES | MESODERM |
| 3 GERM LAYERS PRESENT IN GASTRULATION | TRILAMINAR DISC FORMATION |
| MORULA BECOMES THIS HOLLOW BALL LIKE STRUCTURE | BLASTOCYST |
| ZYGOT BECOMES THIS WHEN IT HAS 8-10 CELLS | MORLUA |
| THIS NERVE IS DERIVED FROM THE MANDIBULAR ARCH | TRIGEMINAL (V) |
| TERM USED TO DESCRIBE NEURAL TUBE FORMATION TO ENCLOSE CNS | NEURALATION |
| THESE CELLS MEET STICKY CELL OF ENDOMETRIUM DURING IMPLANTATION TO DIGEST | TROPHOBLASTS |
| PRIMITIVE ORAL OPENING | STOMODEUM |
| THIS BECOMES THE AXIAL SKELETON | NOTOCHORD |
| CARTILADE THAT CONTRIBUTES TO MANDIBLE | MECKLE'S |
| PHARYNGEAL POUCH I FORMS | MIDDLE EAR AND EUSTACHIAN TUBE |
| PHARYNGEAL POUCH II FORMS | PALATINE TONSILS |
| MANDIBULAR ARCH IS ALSO KNOWN AS | ARCH 1 |
| ARCH II IS ALSO KNOWN AS | HYOID ARCH |
| ARCH I INVOLVES WHAT NERVE? | TRIGENMINAL (V) |
| THE HYOID ARCH INVOLVES WHAT NERVE? | FACIAL (VII) |
| ARCH II INVOLVES WHAT MUSCLES? | NECK, EAR, FACIAL EXPRESSION |
| MANDIBULAR ARCH INVOLVES WHAT MUSCLES? | EAR, MASTICATION |
| THE MANDIBULAR ARCH INVOLVES WHAT BONE/CARTILAGE? | EAR AND MECKLE'S |
| ARCH II INVOLVES WHAT BONE/CARTILAGE? | EAR AND HYOID |
| DORSAL GERM LAYER | ECTODERM |
| MIDDLE GERM LAYER | MESODERM |
| VENTRAL GERM LAYER | ENDODERM |
| EPIBLASTS DIFFERENTIATE INTO | ECTODERM TO COVER THE LINING OF SKIN AND ORAL CAVITY |
| HYPOBLASTS DIFFERENTIATE INTO | ENDODERM LAYER TO LINE THE G.I TRACT |
| EMBRYOBLASSTS DEIFFERENCIATE INTO 2 DISTINCT GERM LAYERS IN WHAT STAGE? | PROLIFERATIVE |
| THE PROCESS OF FORMING 2 DISTINCT GERM LAYERS IN THE PRLIFERATIVE STAGE IS CALLED? | BILAMINAR DISC FORMATION |
| EMBRYOBLASTS ARE | INNER MASS CELLS (AKA EPIBLASTS) |
| EMBRYOBLASTS FORM | EMBRYO |
| TROPHOBLASTS | ARE OUTER MASS CELLS THAT FORM THE PLACENTA |
| WHAT ARE THE EVENTS OF THE PROLIFERATIVE STAGE> | FERTILIZATION, IMPLANTATION AND BILAMINAR DISC FORMATION |
| FERTILIZATION MAIN EVENTS | ZYGOTE, MORULA, BLASTOOCYCST |
| EVENT OF IMPLANTATION | THE TROPHOBLASTS, OR OUTER CELLS OF THE ZYGOT, DIGEST THE ENDOMETRIUM TO AID IN IMPLANTATION |
| MAIN EVENTS IMPLANTATION | TROPHOBLASTS BECOME THE PLACENTA, EMBRYOBLASTS BECOME THE EMBRYO |
| WHAT ORAL TISSUES DOES THE ECTODERM FORM> | ORAL AND NASAL EPITHELIUM |
| WHAT ORAL TISSUES DOES THE MESODERM FORM> | DENTIN, PULP, CEMENTUM, AND PERIO LIGAMENT |
| WHAT ORAL TISSUE DOES THE ENDODERM FORM> | THE POSTERIOR 1/3 OF TONGUE |
| WHAT STRUCTURES ARE ASSOCIATED WITH THE MESODERM GERM LAYER? | MUSCLE, VERTIBRAE, MESENCHYMAL CELLS, CONNECTIVE TISSUE, DERMIS OF SKIN |
| WHAT STRUCTURES ARE ASSOCIATED WITH THE ECTODERM LAYER? | NERVOUS SYSTEM, EPIDERMIS, AND CERTAIN GLANDS |
| WHAT STRUCTURES ARE ASSOCIATED WITH THE ENDODERM LAYER? | GASTROINTESTINAL EPITHELIUM AND GLANDS |
| WEEKS IN THE FETAL STAGE | 8 WEEKS TO 9 MONTHS |
| WEEKS IN THE EMBRYONIC STAGE | 3-8 MWEEKS |
| WEEKS IN THE PROLIFERATIVE STAGE | 0-2 WEEKS |
| EVENTS IN THE EMBRYONIC STAGE | GASTRULATION, NEURALATION, AND DIFFERENTIATION |
| WHAT ARE THE KEY EVENTS IN GASTRULATION | THE TRILAMINAR DISC FORMATION, THERE ARE 3 DISTINCT GERM LAYERS |
| WHAT ARE THE KEY POINTS IN NEURALATION? | THE NEURAL TUBE FORMATION, THIS IS THE FUTURE SPINAL CHORD |
| WHAT IS THE NOTOCHORD | ITS DEEP IN THE NEURAL TUBE AND IT FORMS THE AXIAL SKEL;ETON |
| KEY POINTS IN DIFFERENTIATION | THIS IS THE MOST SENSITIVE OF TIME, ITS WHEN TERATOGENIC EFFECTS CAN OCCUR (4-8 WEEKS) |
| TERATOGENIC EFFECTS | DISRUPTION/MALFORMATION (RADIATION, DRUGS. INFECTIONS) |
| WHAT HAPPENS IF THE NEURAL FOLD DOEASNT FUSE? | SPINAL BIFIDA |
| WHEN DOES THE FACE DEVELOP? | 3-7 WEEKS IN UTERO |
| WHEN AND HOW DOES THE STOMODEUM DEV. | 3-4 WEEKS, THRU INVAGINATION |
| WHAT IS THE FOREGUT | THE PHARYNX |
| THE OUTER SURFACE OF ALL THE BRANCHIAL ARCHES ARE COVERED WITH | ECTODERM |
| THE INNER SURFACE OF ARCH 1 AND ANTERIOR PORTION OF ARCH 2 ARE LINED WITH | ECTODERM |
| THE INNER SURFACE OF ARCH 3-5 ARE LINED WITH | ENDODERM |
| WHEN DO THE BRANCHIAL ARCHES FORM? | 3-5 WEEKS IN UTERO |
| WHAT ARE THE BRANCHIAL ARCHES ALSO CALLED? | THE PHARYNGEAL ARCHES |
| HOW ARE THE ARCHES SEPARATED? | INTERNALLY AND EXTERNALLY |
| INTERNAL (WITHIN THE PHARYNX) | PHARYNGEAL POUCHES |
| EXTERNAL (OUTER SURFACE OF PHARYNX) | BRACHIAL CLEFTS |
| OROPHARYNGEAL MEMBRANE IS ALSO CALLED | THE BUCCOPHARYNGEAL MEMBRANE |
| WHAT DEV THE STRUCTURE OF THE LOWER FACE? | THE MANDIBULAR ARCH |
| WHAT FORMS THE MAXILLARY PROCESS | BRANCHIAL ARCH 1 |
| WHAT FORMS THE MUSCLES OF MASTICATION | BRANCHIAL ARCH 1 |
| WHAT FORMS THE HARD PALATE | MANDIBULAR ARCH |
| WHAT FORMS THE EXTERNAL AUDITORY MEATUS | BRANCHIAL GROOVE 1 |
| WHAT FORMS WEEK 4-5 AT THE SUPERIOR END OF THE OROPHARYNGEAL MEMBRANE | THE OROPHARYNX |
| WHEN DOES THE OROPHARYNGEAL MEMBRANE RUPTURE AT THE INFERIOR END? | WEEK 6-7 TO FORM THE ANAL AND URETHRAL OPENINGS |
Created by:
vdrodrig
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