Identify the labeled structures of the circulatory system in the figure below. 
a. artery
b. endothelium
c. capillary
d. arteriole
e. venule
f. vein
g. smooth muscle
h. connective tissue
-structure labeled "C"
Definitions:
Toilet Trained
The process by which a young child learns to use the toilet for urination and defecation.
Anal
Often associated with a personality type that is meticulous, obsessive, and rigid; derived from Freud's theory of psychosexual development.
Anal Stage
The attachment of libido to the anus.
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