A cell is
A. a small structure within a molecule.
B. a structure composed of several tissue types.
C. the basic structural unit of living organisms.
D. a group of organs with a common set of functions.
E. a group of atoms with similar structure and function.
C
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Humans have ________ pairs of ribs.
A) 2 B) 6 C) 10 D) 12 E) 24
An abnormally rapid and shallow rate of breathing is called _____.?
A) ?apnea B) ?dyspnea C) ?tachypnea D) ?hyperpnea
Which of the following is a function of the blood?
a) defense against toxins and pathogens b) transport of gases c) transport of body heat d) transport of nutrients and wastes e) All of the answers are correct.
The ____________________ vertebra is called the axis.
Fill in the blank(s) with the appropriate word(s).