11) What is the term for cells that produce hormones?
12) The human stomach is primarily responsible for what activity?
13) What is the largest organ in the human body?
14) What type of tissue is found in the heart?
15) What is the scientific name for the kneecap?
16) How many bones are in an adult human body?
17) How much blood does an adult human have in their body?
18) What is the source of the body’s energy?
19) What is the medical term for the upper arm bone?
20) What is the innermost layer of skin called?