Danilenko, G., Popov, N., Pashkevich, S. and YabluchanskyА. 1. FEATURES OF A STATE OF HEALTH AND FUNCTIONING SYSTEMS OF AN ORGANISM OF YOUNGER SCHOOLBOYS DEPENDING ON SOCIAL-PSYCHOLOGICAL ADAPTATION TO TRAINING AT SCHOOL. The Journal of V. N. Karazin Kharkiv National University, series "Medicine". 7 (1), 86-90.