Otic vesicle constricts to form the canalis reuniens. The central part of the otic vesicle represents the membranous vestibule, and is subdivided by a constriction into a smaller ventral part, the saccule, and a larger dorsal and posterior part, the utricle. The dorsal component of the inner ear also consists of what will become the semicircular canals. The utricle and saccule communicate with each other by means of a Y-shaped canal. The FGF, Bmp, Wnt and Pax genes are likely to be involved in otic induction. FGF and BMP signals help control patterning in the early otic vesicle. Fgf3 and Fgf10 are
Basic Human Anatomy the episode positively with a B+, saying, "[I]t's an episode that takes a potentially insipid and unbelievable premise and finds something strangely heartfelt in it." Basic Human Anatomy "Basic Human Anatomy" is the eleventh episode of the fourth season of the NBC sitcom "Community", which originally aired on April 25, 2013. In this episode, Troy and Abed switch bodies - an homage to "Freaky Friday" - while the valedictorian race between Annie and Shirley sees the pair team up to take down Leonard who is currently #1 in the class. The episode was written by Jim Rash, and directed by