The Body Fights Disease - Revised Edition

Exposition of how the body protects itself againt the entry of bacteria and viruses, and how it destroys them. Shows how skin and mucous membranes act as barriers; how white cells ingest organisms, how antibodies attack, both by lysus and clumping; how lymphocytes function to produce the proper antibodies if the body does not have them. Section on viruses shows how they multiply in and and destroy cells... Importance of immunization. Mostly animated