. Die biologische Bulletin. Biologie; Zoologie; Biologie; Meeresbiologie. NEOMENIOID APLACOPHORAN ENTWICKLUNG 93. Abbildungen 15-18. Larvale Strukturen der 1- bis 3-Tage alten Larven. 15. Apikalen Schopf aus mehreren Paketen von zusammengesetzten Zilien. 16. Compound zilien von prototroch. 17. Ventrale Ansicht der apikalen Cap. Die beiden seitlichen Vertiefungen (CD) markieren, wo Intern proliferierenden Zellen sind die zerebrale Ganglien zu bilden. Unciliated Globuli sind zwischen und auf beiden Seiten der Depressionen verstreut. 18. Unterseite des kaudalen Region. Die gesamte Oberfläche ciliated außer Tor zerstreut unciliated glob

• Bildanbieter: Library Book Collection / Alamy Stock Foto
• Bild-ID: RHM94D
• Dateigröße: 7,2 MB (500,5 KB Komprimierter Download)
• Freigaben (Releases): Model - nein | Eigentum - nein
• Format: 1698 x 1472 px | 28,8 x 24,9 cm | 11,3 x 9,8 inches | 150dpi

Weitere Informationen

Dieses Bild ist ein gemeinfreies Bild. Dies bedeutet, dass entweder das Urheberrecht dafür abgelaufen ist oder der Inhaber des Bildes auf sein Urheberrecht verzichtet hat. Alamy berechnet Ihnen eine Gebühr für den Zugriff auf die hochauflösende Kopie des Bildes.

Dieses Bild kann kleinere Mängel aufweisen, da es sich um ein historisches Bild oder ein Reportagebild handel

. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. NEOMENIOID APLACOPHORAN DEVELOPMENT 93. Figures 15-18. Larval structures of 1- to 3-day-old larvae. 15. Apical tuft composed of several bundles of compound cilia. 16. Compound cilia of prototroch. 17. Ventral view of the apical cap. The two lateral depressions (CD) mark where cells are proliferating internally to form the cerebral ganglia. Unciliated globules are scattered between and on both sides of the depressions. 18. Bottom surface of the caudal region. The entire surface is ciliated except tor scattered unciliated globules. The cilia at the periphery and in the center of the caudal region (*) are longer than the rest of the cilia on the caudal surface. AT. apical tuft: CD. cerebral depression: G. globules: Pt. prototroch. groove and near the mouth, hut the rest of the body is covered by hollow, needlelike spicules forming a criss- crossed meshwork within the cuticle. In juveniles, however, flat bladelike spicules were distributed evenly over the entire body along with upright and needlelike spicules (Fig. 25a, c). The juvenile pedal spicules were flat and bladelike as in the adults (Fig. 25b. c), and the head region also was covered with flat, bladelike spicules (Fig. 25d). The development of hollow spicules in early juveniles was observed for the first time in aplacophorans (Fig. 26) by observing within the cuticle of live larvae on a glass slide using polarized light microscopy. The first part of the spi- cules to be secreted was the solid distal tip (Fig. 26a). The spicules continued to grow at the proximal end. becoming hollow with an open end (Fig. 26b). The proximal end finally closed to form a closed-ended hollow spicule with solid base (Fig. 26c). This type of hollow spicule formation is known to continue throughout the growth of adult neo- menioids (Hoffman. 1949). Morphology and fate of apical cells Hoechst nuclear staining. Hoechst nuclear staining showed that cells of the apical

Stockbilder mithilfe von Tags suchen

• booksubjectzoology
• buchautorilliefrankrat
• buchsubjektbiologie