University:
Kentucky State University
Course:
BIO 304 | Vertebrate Embryology
Academic year:

2023
Views:

230

Pages:

2
Author:

kleuk3j4

**Embryology - 2nd Lecture** **Face = Stomodeum + 5 Prominences** * Frontonasal Prominence * 2 Maxillary (Lateral) * 2 Mandibular (Lateral) **2 Nasal Placodes** * Thicken * Invaginate Nasal Pit + medial nasal prominence + lateral nasal prominence Two medial nasal prominences fused together = Intermaxillary segment Maxillary Prominences extend as Palatine Shelves * **Upper Lip:** Two Maxillary prominences + Intermaxillary segment * **Primary palate:** Intermaxillary segment * **Upper Jaw (carrying 4 incisor teeth):** Intermaxillary segment * Secondary Palate: Two maxillary prominences only **A. Unilateral cleft lip:** Maxillary & medial nasal X **B. Bilateral cleft lip:** Maxillary & medial nasal X **C. Median cleft lip:** Medial nasal & medial nasal X **D. Oblique Facial cleft:** Maxillary & lateral nasal X **A. Primary Palate cleft:** primary palate & palatine shelves X * Found anterior to incisive foramen **B. Secondary Palate cleft:** Palatine shelves together X * Found posterior to incisive foramen **Branchial Fistulas = Lateral cervical cyst** * 2nd arch does not cover 3rd & 4th. * X = do not fuse

Embriology 2 Lecture

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