Which of the following body systems functions to produce blood cells?
The cranial cavity is housed in ____________________.
the dorsal body cavity.
Homeostatic imbalance has occurred when a ____________________.
person becomes ill.
Approximately what percentage of the air we breathe is comprised of oxygen?
The structural and functional unit of life is
Heartburn is most often felt in the ____________________.
Which choice below is NOT one of the three components of homeostatic control systems?
Stimulus (cause of the initial change)
Which of the following is the single most abundant chemical substance in the body?
Which of the following is NOT a necessary human life function?
Which internal organ is NOT housed in the ventral body cavity?