. Elementary text-book of zoology. HIRUDO. 195 the crop the blood is slowly passed into the stomach and digested as required. The student will have noticed already in cutting open the leech (by a dorsal incision) that the interior is very different from that of Arenicola. There is no spacious ccelomic cavity; the organs have to be picked out and the skin peeled off. This is due to the fact that the coelom is filled up almost entirely by Coelom Fig. 123.âMagnified View of Two Consecutive Segments OF THE Leech (loth and nth). {Adnat.) Penis pulled in from exterior. Nerve Cord in Ventral Sinus. E
. Elementary text-book of zoology. HIRUDO. 195 the crop the blood is slowly passed into the stomach and digested as required. The student will have noticed already in cutting open the leech (by a dorsal incision) that the interior is very different from that of Arenicola. There is no spacious ccelomic cavity; the organs have to be picked out and the skin peeled off. This is due to the fact that the coelom is filled up almost entirely by Coelom Fig. 123.âMagnified View of Two Consecutive Segments OF THE Leech (loth and nth). {Adnat.) Penis pulled in from exterior. Nerve Cord in Ventral Sinus. Ovisac. connective tissue, the only parts of this cavity which are left being (i) a median dorsal sinus or space, (2) a median ventral sinus surrounding the nerve-cord, and (3) a few small spaces lying immediately over the testes. The blood-vascular system is complex and the blood- vessels have definite walls. There are two â main lateral vessels which give off num- erous smaller branches. These communicate with a. 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 Masterman, Arthur Thomas. Edinburgh, E. & S. Livingstone
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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1900, bookyear1902
