The is covered by a thin layer of skin called the .

Choose the correct drug to complete the sentence. is a powerful stimulant. is a highly addictive opiate. is prescribed for medical purposes in many states.which locations are covered in the drug-free school policy? check all that apply. school bus home school lunchroom sporting event at another school shopping center

True or false. mucous membranes secrete mucus that traps pathogens.

If a doctor needs using a medical imaging machine, a might be called to assist the doctor.