Ch. 4: "Review of biomedical systems for MR-3 flight."
Ch. 5: "Results of preflight and postflight medical examinations"
Ch. 6: "Bioinstrumentation in MR-3 flight."
Ch.7: "Physiological responses of the astronatu in the MR-3 flight."

Digital facsimile from nasa.gov at this link

https://history.nih.gov/

"The Office of NIH History at the National Institutes of Health exists to advance historical understanding of biomedical research within the NIH and the world. Through preserving records of significant NIH achievements, innovative exhibits, and educational programs, the Office of NIH History explores the past to enhance present understanding of the health sciences and the National Institutes of Health."

Of special online interest are the various virtual exhibits available at: https://history.nih.gov/exhibits/nirenberg/index.htm

The site also offers many oral histories available at https://history.nih.gov/archives/oral_histories.html#a