. Text-book of zoology for schools and colleges. Zoology. 256 VERTEBKATE Fig. 128.—A, Breastbone, Blioiilder-gTrdle, and fore-limb of Fengnin (after Owen); b Breast- bone (sternum), with its prominent ridge or keel; ss Sbonlder-blades (scapula); kk Coracoid bones; c Furculum or Merry-tbongbt, coimiosed of the united ooIlar-boueB (ela/eneles); h Bone of the upper arm or hujtierus; r Kadius; u Ulna, fonning together the forearm; q Bones of the wrist or carpus; t Thumb; in Metacarpus; p Vbmagna of the fingers. B, Bibs of the Golden Eagle; a a Bibs giving off processes (&&); cc S
. Text-book of zoology for schools and colleges. Zoology. 256 VERTEBKATE Fig. 128.—A, Breastbone, Blioiilder-gTrdle, and fore-limb of Fengnin (after Owen); b Breast- bone (sternum), with its prominent ridge or keel; ss Sbonlder-blades (scapula); kk Coracoid bones; c Furculum or Merry-tbongbt, coimiosed of the united ooIlar-boueB (ela/eneles); h Bone of the upper arm or hujtierus; r Kadius; u Ulna, fonning together the forearm; q Bones of the wrist or carpus; t Thumb; in Metacarpus; p Vbmagna of the fingers. B, Bibs of the Golden Eagle; a a Bibs giving off processes (&&); cc Sternal ribs. process;" and in birds they are not only separate bones, but they are the strongest bones of the pectoral arch. They are more or less nearly vertical, and they form fixed points for the downward stroke of the wing. The collar-bones or clavi- cles (c) in the great majority of birds are united together in front, so as to form a somewhat V-shaped bone, which is tech- nically called the "furculum," but is familiarly called the " ; The function of this clavicular arch is to keep the wings asunder during their downward stroke, and the strength of the furculum varies, therefore, with the powers of flight enjoyed by each bird. The bones which form the limb proper, or " wing," are considerably modified to suit the special function of flight, but essentially the same parts are present as in the fore-limb of the Mammals. The upper arm is constituted by a single bone, the humerus (A), which is gen- erally short and stout. The forearm is composed of two bones, the radius (r) and the ulna (m), of which the ulna is the bigger. These are followed by the small bones, which. 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 Nicholson, Henry Alleyne, 1844-1899. New
Size: 1871px × 1335px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
