Misc: Which of Mary's arms supports Jesus in Michelangelo's 'Pieta'?

Questions

The lack of this element in the diet is a cause of goitre.?

The largest single organ of the human body is the ________.?

The teeth used for biting or cutting are known as _______.?

These animals were once used to bleed the sick.?

These attach muscles to bones or cartilage.?