Doing chores, helping, doing homework, being nice to others
Protozoa-
Cholera
Malaria
Amebic Dysentery
Fungi-
Ringworm
Athlete's foot
Histoplasmosis
Rickettsiae-
Typhus Fever
Rocky Mountain Spotted Fever
African Tick Bite Fever
The human body is mostly made up of water (H2O), and there is one oxygen atom in each molecule of water. Note that, although each water molecule also contains two hydrogen atoms, the atomic mass of hydrogen (about 1) is much smaller than the atomic mass of oxygen (about 16). Because of this, hydrogen contributes less to human body mass than oxygen.