. The crayfish; an introduction to the study of zoology. Crayfish; Zoology. em. }' aTlJ2. zaa. Fig, 15.—Astacus fltiviatilis,—A diagraminatic transverse section of the thorax through the twelfth somite, showing the course of the circulation of the blood ( x 3). arh. 12, the anterior or lower, and arV. 12, the posterior or upper arthrobranchia of the twelfth somite ; av, afferent branchial vessel ; hcv^ branchio-cardiac vein ; tg, branchiostegite; em^ extensor muscles of abdomen; eiy, epi- meral wall of thoracic cavity ; cy, efferent branchial vessel; fm, flexor muscles of abdomen ; fp^ f
. The crayfish; an introduction to the study of zoology. Crayfish; Zoology. em. }' aTlJ2. zaa. Fig, 15.—Astacus fltiviatilis,—A diagraminatic transverse section of the thorax through the twelfth somite, showing the course of the circulation of the blood ( x 3). arh. 12, the anterior or lower, and arV. 12, the posterior or upper arthrobranchia of the twelfth somite ; av, afferent branchial vessel ; hcv^ branchio-cardiac vein ; tg, branchiostegite; em^ extensor muscles of abdomen; eiy, epi- meral wall of thoracic cavity ; cy, efferent branchial vessel; fm, flexor muscles of abdomen ; fp^ floor of pericardium ; gn. 6, fifth thoracic ganglion ; h, heart ; kg, hind-gut; iaa, inferior abdominal artery, in cross section ; la, lateral valvular apertures of heart ; li; liver ; mp, indicates the position of the mesophragm by which the sternal canal is bounded laterally ; 7;, pericardial sinus ; pdb. 13, podobranchia, and 2^^^. 12, pleurobranchia of the twelfth somite ; 4'<2,sternal artery ; saa^ superior abdominal artery ; sc, sternal canal; t, testis ; xii., sternum of twelfth somite. The arrows indicate the direction of the blood 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 Huxley, Thomas Henry, 1825-1895. New York, D. Appleton and company
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Keywords: ., bookauthorhu, bookcentury1800, bookdecade1880, booksubjectzoology
