University:
Camosun College
Course:
NURS132 | Promoting Health and Wellbeing
Academic year:

2023
Views:

222

Pages:

5
Author:

Aysha A.

EMBRYOLOGY OF LIP AND PALATE 4th Week GA By the end of the fourth week, all five swellings have appeared. The Maxillary swellings can be distinguished lateral, and the mandibular swellings candle to the stormodeum. The Frontonajul process is grey in these illustrations. 5th Week GA (early) The paired maxillary swellings enlarge and grow ventrally and medially. A pour of ectodermal thickening called the nasal placodes appears on orange. the Frantorasal process and begin to 5th Week GA (late) The stadion at the centre of each nasal placode magnate to form placode into an oval hasad pit, dividing the raised mim of & lateral nasal process and a medial masala provers 6th Week GA Each medial marcel process begins to migrate towards the otter anal they fuse. The mandibular Iwelling have tow fused to create the primordial lower lip. The masal pits deeper and fuse to form a single, enlarged, clitoral nasal sac. 7th Week GA: Lateral and inferior expansion of each fused mediad Masal process. forms the mormaxillary pro process. The tips of the maxillary swellings grow to meet this process and fuse with it. The informax-Illany process gives rise and the philtrum on to the bridge and septum of the nose, upper lip. 10th Week GA: Ectoderm and mesoderm of frentel proces. Process proliferate, forming a into two nasel and ever cathedral hasal midline nasal septum. This divides the two horas barrages wtech oper into the pharynx, behind the secondary palate, through the definitive chiara. Maral cavity lott Week GA The philtrum is now formed, and the lateral portions of the maxillary and mandibular swellings fuse to create the Cheeks and reduce the mouth to its final width Development of Palade: The palate has two key stages of development during embryonic (primary) and an the fusion of structures and a transition. early Fetel (secondary) involving key epithelial & mesenetrytmal Two parts form the primary palate: 1) Maxillary components of the first pharyngeal arch (lateral) 2) Frontonasal prominencelinid line) 11 The secondary palate can also be divided Parts: in two anatomies. 1) Anbarer hand palele - ossified (contributions from the maxilla oland palate bones) 2) Posterior soft palate - muscular. The ord side of be palake is covered wiles squamous strati fied (pluristratified) epithelium. The surface of the hand palate. of most mammalian species is of palatal vidges ridges further Hirown into. a series or rugae palatine, that are trasvers d Both the palatal ridge tuumber and arrangement also species specific. 7th week GA: The Hoor of the Masal cavity at las stage is a posterior extension of the intermaxillary process known as be primary palete. The medial walls of the maxillary Swellings begin to produce a parrot thien Imediel extensions palatine shelves', atrich grow inferiorly on either side of torque 8th Weck GA: The langue moves downwards and the palatime shelves rapidly mate rotate cupwards bowmass the mid line, growing trovizontally. Halo