STUDI ANATOMI DAN HISTOLOGI ORGAN REPRODUKSI JANTAN ULAR SANCA KEMBANG (Malayopython reticulatus) DAN PENGEMBANGAN ATLASNYA SEBAGAI SUMBER BELAJAR BIOLOGI KELAS XI SMA/MANIM.: 22104070023Hana Anisa’atul AbrorauthorThe reticulated python (Malayopython reticulatus) is a reptile from the squamata order that has unique characteristics. This study aims to determine the anatomical and histological characteristics of the male reproductive organs of the reticulated python and integrate them into biology learning media through its development as a learning resource in the form of an atlas. This research is a study of the anatomy and histology of the male reproductive organs in the reticulated python, and uses the Research and Development (R&D) method and the ADDIE model which is limited only to the development stage in the development of the atlas. The sample of this study used a male reticulated python aged approximately 2 years with a length of 2.5 meters. The results of the study show that the anatomical structure of the male reproductive organs, including the testes, ductus deferens and hemipenis, has a visceral asymmetry pattern (not parallel). This study also produced a cross-sectional preparation of the male reproductive organs in snakes, so that the constituent tissues can be explained. The results of this scientific research were then developed into an anatomical and histological atlas as a learning resource for grade XI high school students. The atlas was developed using the Canva application through several stages of preparation. The atlas was evaluated by one media expert, one content expert, five peer reviewers, one high school biology teacher, and 15 eleventh-grade high school students. The assessment results for the anatomy and histology atlas of the male organs of the reticulated python (Malayopython reticulatus) indicated excellent qualifications, with assessment scores of 98% (Very Appropriate) from the content expert, 80% (Very Appropriate), 97% (Very Appropriate) from the peer reviewer, 100% (Very Appropriate) from the biology teacher, and 95% (Very Appropriate) from the students. Therefore, this atlas is highly suitable for use as a biology learning resource for high school students.570.7 Pendidikan Biologi2026-05-13UIN SUNAN KALIJAGA YOGYAKARTA;FAKULTAS ILMU TARBIYAH DAN KEGURUANThesis