The institution owns the copyright but is not interested in exercising control or.The copyright was injected into the public domain for other reasons, such as failure to adhere to required formalities or conditions.The copyright is in the public domain because it has expired.For more information see Flickr API detail. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.Īt the time of upload, the image license was automatically confirmed using the Flickr API. At the sides of the tube betweenthe successive vertebra are the intervertebral foramina throughwhich the nerves pass out from the spinal cord to the variousparts of the body. A bony tubewhich surrounds and protects the spinal cord: divisible intoan anterior part which is divided transversely into ninerings or vertebrae, and a posterior unsegmented portion of aboutequal length-the urostyle. a, astragalus : c, calcaneum : d, suprascapula: e, exoccipital: /, femur :fip, frontoparietal:_ g, metacarpals : h, humerus : i, ilium : U, metatarsals :J, carpus : m, maxilla : n, nasal: o, pro-otic : %>, pterygoid : pm, premaxilla :g, quadratojugal: r, radio-ulna : s, squamosal: se, sphenethmoid: s.v,sacral vertebra : t, tibio-fibula : u, urostyle. The skeleton of the frog, seen from the dorsal surface: the leftsuprascapula and scapula have been removed. Prepare skeletons for yourself by soaking the parts in hotwater, and carefully brushing away the soft tissues until theskeleton is clean. Colour, in your draivings, the cartilageblue, the cartilage hones yellow, and the membrane hones white orred. Examine the prepared skeletons and malce careful drawings toscale of the several parts. The skeleton may be conveniently divided into (1) the axialportion, including the skull and the vertebral column : and(2) the appendicular portion, including the limbs and thelimb-girdles which attach them to the body. Cartilage may alsobecome calcified, i.e., have calcareous salts deposited in itsmatrix, without in any way taking on the character of true bone. The first instance as ossifications in thedermis or deeper layer of the skin: in many fish they retainthis primitive position, but in the frog and most higher verte-brates they sink below the skin and graft themselves on to themore deeply placed cartilaginous skeleton. 1852-1893Ĭontributing Library: Smithsonian Librariesĭigitizing Sponsor: Smithsonian LibrariesĬlick here to view book online to see this illustration in context in a browseable online version of this book. Title: The frog : an introduction to anatomy and histologyĪuthors: Marshall, A. Identifier: frogintroduction00mars ( find matches)
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