. Elementary text-book of zoology. Zoology. FIG. 52.—Male of Branchipus stagnalis with mnny- chambered heart or dorsal vessel fig, the lateral openings in which are repeated in every seg- ment. D, intestine ; 3f, mandible; Sd, shell gland; Er, branchial appendage of the llth pair of legs; T, te^ • A r. FIG. 53.—Heart of a Copepod (Calanella) with an ante- rior artery, A. Os, ostia ; V, valves at the arterial ostium ; M, muscle. maintains a continuous circulation of the blood. The heart is either sac-shaped, with two lateral or one anterior slit-like opening (Daphnia, Calanus) (fig. 51), o
. Elementary text-book of zoology. Zoology. FIG. 52.—Male of Branchipus stagnalis with mnny- chambered heart or dorsal vessel fig, the lateral openings in which are repeated in every seg- ment. D, intestine ; 3f, mandible; Sd, shell gland; Er, branchial appendage of the llth pair of legs; T, te^ • A r. FIG. 53.—Heart of a Copepod (Calanella) with an ante- rior artery, A. Os, ostia ; V, valves at the arterial ostium ; M, muscle. maintains a continuous circulation of the blood. The heart is either sac-shaped, with two lateral or one anterior slit-like opening (Daphnia, Calanus) (fig. 51), or elongated and divided into successive chambers and perforated by many pairs of slit-like openings (Insects, Apus) (fig. 52). As a rule, each chamber possesses a pair of laterally placed. 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 Claus, Carl, 1835-1899; Sedgwick, Adam, 1854-1913; Sinclair, F. G. (Frederick Granville), b. 1858. New York : Macmillan
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
