. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. Fig. 52.—Male of Branchipus stagnalis with many- chambered heart or dorsa? vessel .Rg, the lateral openings in which are repeated in every seg- ment. D, intestine ; M, mandible; Sd, shell gland; Br, branchial appendage of the 11th pair of legs ; T, Fig. 53.—Heart of a Copepod (Calanella) with an ante- rior artery, A. Os, cstia ; 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-
. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. Fig. 52.—Male of Branchipus stagnalis with many- chambered heart or dorsa? vessel .Rg, the lateral openings in which are repeated in every seg- ment. D, intestine ; M, mandible; Sd, shell gland; Br, branchial appendage of the 11th pair of legs ; T, Fig. 53.—Heart of a Copepod (Calanella) with an ante- rior artery, A. Os, cstia ; 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; Metcalf Collection (North Carolina State University). NCRS. London, Swan Sonnenschein
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanimals, bookyear1892
