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Cells that transport oxygen and carbon dioxide are:  

The life span of an erythrocyte is:  

All of the following are organs of the respiratory system except: A) nose. B) pharynx. C) lungs. D) tongue.

In the term leukocyte, the combining form leuk/o means:  

A protein substance that is produced in the body in response to an invading foreign substance is called a/an:  

In the term lymphedema, the suffix -edema means:  

During an acute stage, acyclovir may be used to relieve symptoms of ________. A) gonorrhea B) syphilis C) chlamydia D) herpes genitalis

The suffix that means hormone is: A) -ine. B) -one. C) -ism. D) -gen.

Prolactin is secreted by the: A) posterior lobe of the pituitary. B) pineal gland. C) ovaries. D) anterior lobe of the pituitary

Drooping of the upper eyelids is called: A) blepharitis. B) blepharoptosis. C) chalazion. D) conjunctivitis.