medical illustration

Discover the intricate process of polar body formation in Asterias glacialis, a fascinating aspect of reproductive biology illustrated in the historic Gray’s Anatomy of the Human Body book from 1918. This detailed medical image, slightly modified from Hertwig’s original work, showcases the stages of meiosis in the egg of the starfish species, offering a glimpse into the cellular mechanisms that ensure genetic diversity. Each stage, from the initial movement of the polar spindle to the development of the female pronucleus, is meticulously depicted, providing valuable insights for students, researchers, and medical professionals interested in embryology and cellular biology.

This clear and comprehensive anatomical illustration presents the fundamental structures of the human heart with precise labeling and color-coding. The diagram effectively distinguishes between oxygenated (red) and deoxygenated (blue) blood pathways, while showcasing the heart's chambers, valves, and major vessels in an easy-to-understand format.

This detailed anatomical illustration presents two complementary views of the human heart, showcasing its external structure and coronary circulation system. The side-by-side comparison effectively demonstrates both the major vessels and chambers alongside the intricate network of coronary vessels that supply the heart muscle itself, using clear color differentiation between oxygenated and deoxygenated blood pathways.

This detailed anatomical diagram presents a comprehensive view of the human heart's primary structures and blood vessels. The illustration effectively demonstrates the heart's complex architecture through a clear line drawing that identifies all major components, including the four chambers, various valves, and principal blood vessels. This educational outline serves as an essential tool for understanding cardiac anatomy and the intricate system that keeps our bodies functioning.

This detailed anatomical illustration showcases the human heart's structure with a clear emphasis on blood flow patterns, indicated by directional arrows. The diagram employs an effective color-coding system - red representing oxygenated blood vessels and blue showing deoxygenated blood pathways - while also highlighting the heart's chambers, valves, and major vessels.