metanephric segmentation are seen in which phyllum
Answers
Answer:
Annelids
Phylum Annelida includes vermiform, segmented animals. Segmentation is seen in internal anatomy as well, which is called metamerism. Annelids are protostomes.
Answer:
Metanephric and pronephric nephrons share a similar segmentation pattern. (a) Mammalian metanephric kidney, with enlargement depicting the segmental organization of a single nephron. (b) Zebrafish embryo, shown in a lateral view, with the pronephros depicted in blue. Enlargement shows a dorsal view of the pronephros, with the segmental organization of each nephron as indicated. Inset shows the previous model of nephron organization. (c) Xenopus embryo, shown in a lateral view, with pronephros depicted in blue. Enlargement shows a lateral view of only one nephron. Inset shows the previous model of nephron organization. For all nephrons, color-coding of analogous segment identities is based on comparison of gene expressions6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 as depicted in Abbreviations: ATL, ascending thin limb; C, cloaca; CD, collecting duct; CNT, connecting tubule; CS, corpuscle of Stannius; DCT, distal convoluted tubule; DE, distal early; DL, distal late; DTL, descending thin limb; G, glomus; MD, macula densa; N, neck; Ne, nephrostome; P, podocytes of renal corpuscle; PCT, proximal convoluted tubule; PD, pronephric duct; PE, proximal early; PL, proximal late; PST, proximal straight tubule; T, tubule; TAL, thick ascending limb.