BIO380H5 Lecture 11: Lecture 11 notes – Head and Neck
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1 chondrocranium (the skull that contains the brain), associated with the brain and the major sense organs (nose, eye, ear); Later in development, these aortic arches will start to regress (aortic are 1-4 will disappear; but aortic arch #6 will remain) 4 folds- the folds will correspond to endodermal lined out pocketing from the pharyngeal tube. What are the endoermally lined out pocketing of the pharyngeal tube pharyngeal pouches. The mesoderm covering the pouches are the pharyngeal arches. In between the pharyngeal arches are the pharyngeal grooves. In a 1-month-old embryo, the pharyngeal part of the foregut contains four lateral pairs of lined out pocketing called pharyngeal pouches and an unpaired ventral midline the thyroid primordium. If the contours of the ectodermal covering over the pharyngeal followed, bilateral pairs of in pocketingcalled pharyngeal grooves are seen endodermally diverticulum, region are.
