. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BIOLUM1NESCENCE IN A DEEP-SEA OCTOPOD 29. Figure 2. Digitized frames from a video sequence of light emission (white spots) from photophores/suckers taken from video of an animal filmed in the dark using an intensified video camera (Inlevac's NiteMatc 1305/1306 CCTV Intensifier coupled to a Panasonic CCD). Two amis are shown. For scale, their closest approach is approximately 1 cm. microvilli (Fig. 7C). All three cell types are interconnected by apical adherens and subapical septate junctions (Fig. 7D). At the center of the l
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BIOLUM1NESCENCE IN A DEEP-SEA OCTOPOD 29. Figure 2. Digitized frames from a video sequence of light emission (white spots) from photophores/suckers taken from video of an animal filmed in the dark using an intensified video camera (Inlevac's NiteMatc 1305/1306 CCTV Intensifier coupled to a Panasonic CCD). Two amis are shown. For scale, their closest approach is approximately 1 cm. microvilli (Fig. 7C). All three cell types are interconnected by apical adherens and subapical septate junctions (Fig. 7D). At the center of the light organ, the infundibular epithe- lium invaginates to form the acetabulum, which is seen externally as an opening, or pore (Figs. 3B, 4A). This central opening continues internally as a blind canal (Fig. 5C). The acetabular cells differ from those of the infundib- ulum primarily in the basal position of the nuclei, the highly interdigitated lateral membranes, and the diminution of the outer two layers of the cuticle (Figs. 5C: 8A. B). The infundibulum and the acetabulum rest on a basal lamina beneath which is located an expanded layer of con- nective tissue with a maximum thickness of jam (Figs. 5C; 8C, D). Fibers, presumably collagen, although confir- mation of this is not provided by the data, are arranged in alternating directions in multiple layers, giving the tissue a herringbone appearance. Occasional breaks, traversed by nerve axons, were observed in this otherwise continuous connective tissue sheath. Muscle and neural tissue Beneath the connective tissue underlying the epithelium of the infundibulum and acetabulum is a mass of tissue consisting of muscle and neural cells; this surrounds and encapsulates the outer epithelium (Figs. 5; 8A, E; 9). The myofilaments. which include thick filaments (25 and 50 nm in diameter) and thin filaments consistent with the size of myosin and actin, are oriented in three planes—circular. radial, and longitudinal with respect to
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
