Anatomical diagrams from LJS 49, Tashrih-i Mansuri (Mansur’s Anatomy), an anatomy treatise in Persian and Arabic, originally written in 1396, with chapters on bones, nerves, veins, arteries and muscles, and complex organs. Ours is an early copy - a colophon indicates it was completed in the year 813 (1411 in the Gregorian Calendar) - and it is probably an autograph, that is, in the hand of the author himself, Manṣūr ibn Muḥammad ibn Aḥmad. Mansur’s work was based on the anatomical writings of Galen, which had been introduced into the Muslim world by Hunayn ibn Ishaq in the ninth century, and they remained in use until the seventeenth century.
According to the entry for LJS 49 on p. 85 in Transformation of Knowledge: Early Manuscripts from the Collection of Lawrence J. Schoenberg, the illustrations in this manuscript are some of the earliest known representations of the human body in the Islamic world. I’d always thought that Islamic law forbids the representation of the human body in art, so the inclusion of these illustrations in this book is interesting. Here is a blog post that says a bit more about that, in relation to this manuscript: http://facsimilium.blogspot.com/2011/12/tashrih-al-badan-anatomy-of-body-14th.html
Manuscript description and digitized images: http://openn.library.upenn.edu/Data/LJSchoenbergManuscripts/html/ljs49.html
Ebook (in epub format): http://repository.upenn.edu/sims_ebooks/25/