STRUKTUR HISTOLOGIS ORGAN EKSKRETORIK PADA ULAR JALI (Ptyas mucosa Linnaeus, 1758) dan ULAR BELANG HITAM (Pseudolaticauda semifasciata Reinwardt, 1837)

Osmoregulation is process to maintain balance of water and electrolytes concentration inside body. Each habitat has its own characteristic of environmental conditions. This research was conducted to examine the histological structure of ren, ureter, and kloaka of Common Rat Snake Ptyas mucosa and Black-banded Sea Krait Pseudolaticauda semifasciata. Common Rat Snake represented terrestrial snake whereas Black-banded Sea Krait represented marine snake. Total length and body weight of both snakes (female adult size) was measured. Snakes were euthanized with chloroform inhalation. Ren, ureter, and kloaka were submerged into fixative solution (neutral buffered formaline 10%). Slides were made with paraffin method and Hematoxylin Eosin staining. All slides include ren anterior, ren median, ren posterior, ureter anterior, ureter posterior, and cloaca were observed with light microscope. Morphology and histological structure of ren, ureter, and kloaka of P.mucosa and P.semifasciata were compared. Histomorphometry of ren of both snakes were also measured and analyzed with Student t-Test. The results showed that Black-banded Sea Krait had fewer glomerulus, smaller diameter of glomerulus, smaller diameter of tubulus proximal, and higher epithelium cell of tubulus proximal than those of Common Rat Snake. Common Rat Snake had a bigger ureter than that of Black-banded Sea Krait. Ureter epithelium of Common Rat Snake were transitional, whereas ureter epithelium of Black-banded Sea Krait were simple columnar. Conclusion of this reserach were histological structure of ren and ureter between Common Rat Snake and Black-banded Sea Krait were different, whereas histological structure of cloaca between those two snakes were not different