Bedtime for children, [51]

Blood, arterial, [172];
how changed in the body, [174];
venous, [171], [172]

Boils, how caused, [95], [99]

Bones, [163]

Bronchi, [175]

Building foods, [14], [15]

Candy, when harmful, [54];
when not harmful, [54]

Canned meats, why poisonous, [32]

Capillaries, [172]

Cells, are alive, [6];
body made of, [6];
body needs new, [14];
how killed, [7];
must not be killed, [6];
size of a, [5];
what they are like, [5]