The frog: an introduction to anatomy, histology, and embryology . ic acid. When the hones are thcyroughVy soft, which wiU takefrom a few hours to Z or i: days or mm-e according to the strengthof add employed, remove the head from the decalcifying solutiontmd t/ransfer to weak alcohol and thence to strong alcohol. Thenstain with borax carmine and imbed in paraffin, and cut intotransverse sections with a microtome. Mownt the sections inseries ; examnine and, d/ravi them, showing the following points: 1. The periotic capsule consists mainly of cartilage, and is firmly fused with the hinder part o
The frog: an introduction to anatomy, histology, and embryology . ic acid. When the hones are thcyroughVy soft, which wiU takefrom a few hours to Z or i: days or mm-e according to the strengthof add employed, remove the head from the decalcifying solutiontmd t/ransfer to weak alcohol and thence to strong alcohol. Thenstain with borax carmine and imbed in paraffin, and cut intotransverse sections with a microtome. Mownt the sections inseries ; examnine and, d/ravi them, showing the following points: 1. The periotic capsule consists mainly of cartilage, and is firmly fused with the hinder part of the cranium. 2. The vestibule is a membranous sac lying in the cavity of the periotic capsule, and filled with a watery fluid, theendolymph: it is partly divided by a constriction intotwo main divisions: i. The utriculus is the upper and larger division. ii. The sacculus is the inferior and smaller division: from it arise three small saccular dilatations, supposed to represent the cochlea of higher animals. iii. The ductus endolymphaticus rises from the inner. Fig. 19.—The right internal ear of the frog, removed from theperiotic cartilage and drawn from the outer surface. ffi, the anterior vertical semicircular canal; b, its ampulla; h, thehorizontal canal; i, its ampulla ; p, the posterior vertical canal; r, itsampulla; s, the sacculus ; », the utriculus. THE EAE 95 and upper border of the saoculus as a tube whichterminates in a large thin-walled sac. 3. The semicircular canals are three tubular offsets of the vestibule, into which they open at both ends. They liein canals in the periotic cartilage, and are placed in planesat right angles to one another; each has at one end, closeto its opening into the vestibule, a dilatation or ampulla,i. The anterior vertical canal has its ampulla at its anterior The posterior vertical canal has its ampulla at itsouter end, while its inner end joins the posteriorend of the anterior vertical canal to open intothe vestibule by a
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbiology, bookyear1896
