The 7th edition is a common academic reference found on several educational platforms: Full Textbook (PDF)
Programs in Medicine, Biology, Biotechnology, Agronomy, and Biochemistry use it to level the playing field for incoming students.
A deep, arterial red pulsed from its throat, spreading in rhythmic waves down its spine. It looked like a heartbeat you could see. Elena smiled, the soft crimson light washing over her weathered face.