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Fig. 6 | Frontiers in Zoology

Fig. 6

From: A subterminal growth zone at arm tip likely underlies life-long indeterminate growth in brittle stars

Fig. 6

Ectoneural epithelium and terminal pit epidermis in the terminal arm segment of A. kochii. Transmission electron microscopy. (a) Cross-section of the ectoneural neuroepithelium of the radial nerve cord before its fusion with the epidermis of the terminal pit. (b) Sagittal section through the epidermis of the terminal pit. Inset shows the cilium and microvilli on the apical surface of the pit epidermis. ce—epidermal cuticle; cn—epineural cuticle; ec—epineural canal; ee—epineural epithelium; n—neuronal perikaryon

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Frontiers in Zoology

ISSN: 1742-9994