|Insulin and glucagon are ____ that regulate blood glucose.
|The four human blood ____ are: A, B, AB, and O.
|Cholera, plague, tuberculosis, and tetanus are caused by ____.
|The ____ are the two upper chambers of the heart.
|The reproduction of bacteria can be stopped by ____.
|Incisors, canines, bicuspids, and ____ are types of teeth.
|Biceps and triceps are upper arm ____.
|Blood travels from your heart to your legs through ____.