. PR. EXT. M. A P. SEM. GR. Fig. 15. Limacina bulimoides. The penial sac containing the coiled prostate gland illustrated as a stereogram by the opening of the sac in an obliquely longitudinal plane. The prostate is represented as having been cut transversely at three points, , which ends bluntly in the direction of the observer, and which becomes continuous above the plane of the section with PR-2, forming the terminal part of the prostate lying at the base of the intromittent portion of the penis. The arrows suggest the course followed by the sperm from the seminal groove, through t
. PR. EXT. M. A P. SEM. GR. Fig. 15. Limacina bulimoides. The penial sac containing the coiled prostate gland illustrated as a stereogram by the opening of the sac in an obliquely longitudinal plane. The prostate is represented as having been cut transversely at three points, , which ends bluntly in the direction of the observer, and which becomes continuous above the plane of the section with PR-2, forming the terminal part of the prostate lying at the base of the intromittent portion of the penis. The arrows suggest the course followed by the sperm from the seminal groove, through the interstices between the prostate and the wall of the penial sac, to the base of the intromittent portion. The inset diagram shows the shape of the intact prostate. '', vacuolated connective tissue, forming cartilage-like support of the intromittent portion of the penis; '', 'cartilaginous' connective tissue of the wall of the penial sac; COMM., communication between the grooves of the penial sac and the base of the intromittent portion; , glandular epithelium forming the general lining of the penial sac; , lumen of the intromittent portion of the penis; , lumen of the prostate; , male genital aperture at anterior end of penial sac; , prostate as indicated by dotted lines through wall of penial sac; , , PR-2, prostate gland; , investment of prostatic epithelium external to the tubular prostate gland; , ciliated seminal groove, running from common genital aperture to male opening; SEP., septum.
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Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
