Embryology and Development — Flashcards

Flashcard 321: 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 322: Forehead, bridge of the nose, the medial and lateral nasal prominences are formed by _____ prominence

Answer: frontonasal

Flashcard 323: Tympanic cavity is formed from the _____ pharyngeal pouch

Answer: first

Flashcard 324: What are the two derivatives of the mandibular prominence of the first pharyngeal arch?_____

Answer: Meckel's cartilage and mesenchyme

Flashcard 325: The cardiac and smooth muscles are derived from the _____ mesoderm.

Answer: splanchnic

Flashcard 326: Anatomical closure of the fetal circulatory adjustments occurs in the following sequence: _____

Answer: Ductus venosus > Ductus arteriosus > Foramen ovale

Flashcard 327: The _____ sinus develops until early adulthood.

Answer: frontal

Flashcard 328: Which germ layers of the embryo are derived from the epiblast?_____

Answer: All 3 (ecto,endo,mesoderm)

Flashcard 329: Which part of middle ear are formed from the otic capsule?_____

Answer: Stapes footplate and annular ligament

Flashcard 330: _____ is a type of conjoint twin where there is a fusion of the head or cranium.

Answer: Craniopagus