GCSE Science Revision Digestion

############################# Video Source: www.youtube.com/watch?v=32gNePkj1_4

How does human digestion work? Watch this video to find out.

GCSE, Science, Revision, digestion, villi, B1, B2, B3, KS4, KS3, KS5, igcse, gateway, 21st, century
#############################