Which creature has 3 hearts?
How many teeth do humans have?
Where would you find a crab's teeth?
How many bones do sharks have in their body?
Which two parts of the body continue to grow for your entire life?
What are the five human senses?
What is the largest gland in the human body?
Which creature has eyes at the tips of its arms?
Which is the longest muscle in the human body?
How many lungs does the human body have?