Autolysis and heterolysis of the degenerating epidermis of the tail fin of Rana japonica tadpoles during spontaneous metamorphosis were observed by transmission and scanning electron microscopy. In the early climactic stages of metamorphosis (st. 19-20), the outermost epidermal cells developed vacuo
Characterization of macrophages in the tail of the anuran tadpole
β Scribed by Nishikawa, Akio ;Yoshizato, Katsutoshi
- Publisher
- John Wiley and Sons
- Year
- 1986
- Tongue
- English
- Weight
- 418 KB
- Volume
- 239
- Category
- Article
- ISSN
- 0022-104X
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β¦ Synopsis
Macrophage-like cells in the tail mesenchyme of bullfrog tadpoles were isolated and characterized. These cells actively ingested latex beads into their perinuclear cytoplasm and thyroid hormone was essential for their survival in vitro. The requirement for this hormone is a unique property of these cells since other types of tail cells, such as epidermal cells and mesenchy-ma1 fibroblasts, are unable to survive in the presence of the hormone. The unusual characteristics of the cells suggest that they are indeed phagocytic macrophages and that they play a crucial role in the thyroid hormone-dependent breakdown of the tail.
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## Abstract Configurations of the rectus abdominis in tadpoles of 60 anuran species in 13 families were examined. This muscle is present by Gosner stage 25 and does not change until late in metamorphosis. The anterior terminus of the r. abdominis usually is a straight, transverse front or fanβshape
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