Embryology and Development — Flashcards

Flashcard 311: Meckel's cartilage of the first pharyngeal arch gives rise to which structures? _____

Answer: Malleus, incus, anterior malleolar ligament, spine of the sphenoid, and the sphenomandibular ligament (5)

Flashcard 312: What are the skeletal derivatives of the fourth pharyngeal arch?

Answer: Thyroid and epiglottic cartilages

Flashcard 313: _____ years is the age of mixed dentition

Answer: 6-13 years

Flashcard 314: Philtrum of the upper lip, crest of the nose, and tip of the nose are formed by _____ process

Answer: medial nasal

Flashcard 315: Once the blastocyst cavity is fully lined with Heuser's membrane, it is called as the _____ cavity.

Answer: exocoelomic

Flashcard 316: Embryologically, Parotid is derived from the _____

Answer: ectoderm

Flashcard 317: Forehead, bridge of the nose, the medial and lateral nasal prominences are formed by _____ prominence

Answer: frontonasal

Flashcard 318: The sclera (except supero-temporally) and ciliary muscles are formed from _____

Answer: Neural crest

Extra: The supero-temporal portion of the sclera is derived from paraxial mesoderm.

Flashcard 319: Faulty migration of neural crest cells results in _____ dysgenesis of the eye

Answer: anterior segment

Flashcard 320: What are the skeletal derivatives of the third arch?_____

Answer: Greater cornu and lower part of hyoid