BGDB Face and Ear - Early Embryo: Difference between revisions
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==Week 4== | ==Week 4== | ||
During week 4 a number of features appear visible on the embryo surface: | During week 4 a number of features appear visible on the embryo surface: | ||
Revision as of 12:45, 15 April 2011
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Week 4
During week 4 a number of features appear visible on the embryo surface:
At the level of the body somite bulges and limb buds appear. At the level of the head sensory placodes and pharyngeal arches appear.
Carnegie Stage 12 to 14
Sensory Placodes
Sensory placodes develop as small patches of ectodermal thickenings. The placodes are laterally paired and contribute key components to sensory structures of the ear, eye and nose and are named by the sensory system and components they will form: otic placode, lens placode and nasal placode.
Pharyngeal Arches
Stage 13 Pharyngeal Arches
Look through the cross-sections of the stage 13 embryo observing and identfying structures of the face and ear visible at this stage.
Stage 13 Pharynx
Structures derived from Arches
Structures derived from Pouches
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BGDB: Lecture - Gastrointestinal System | Practical - Gastrointestinal System | Lecture - Face and Ear | Practical - Face and Ear | Lecture - Endocrine | Lecture - Sexual Differentiation | Practical - Sexual Differentiation | Tutorial
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Cite this page: Hill, M.A. (2024, May 19) Embryology BGDB Face and Ear - Early Embryo. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/BGDB_Face_and_Ear_-_Early_Embryo
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
