. A manual of zoology. PHYLUM CHORDATA 327 glossus, is both a respiratory and a food current, the animal feeding passively on the minute organisms in the surrounding water. There is a system of blood-vessels, but no heart. A contractile median ventral vessel, the ventral aorta, runs forward in the ventral wall of the pharynx, and gives off lateral branches, the afferent bran- chial vessels, which pass upwards in the branchial lamellae. Efferent branchial vessels receive the blood from the wall of the pharynx and open dorsally into a pair of longitudinal vessels, the dorsal aorta. The. Please n
. A manual of zoology. PHYLUM CHORDATA 327 glossus, is both a respiratory and a food current, the animal feeding passively on the minute organisms in the surrounding water. There is a system of blood-vessels, but no heart. A contractile median ventral vessel, the ventral aorta, runs forward in the ventral wall of the pharynx, and gives off lateral branches, the afferent bran- chial vessels, which pass upwards in the branchial lamellae. Efferent branchial vessels receive the blood from the wall of the pharynx and open dorsally into a pair of longitudinal vessels, the dorsal aorta. The. 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 Parker, T. Jeffery (Thomas Jeffery), 1850-1897; Haswell, William A. (William Aitcheson), 1854-1925. New York, The Macmillan Company; London, Macmillan & Co. ,Ltd.
Size: 1310px × 1908px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1900
