Which Statement About the Crustacean Circulatory System Is False

Multiple Choice

Which statement about the crustacean circulatory system is false?

A) A heart is usually present.
B) Blood is pumped out of openings in the heart called ostia.
C) Blood is pumped out of the heart into arteries.
D) Crustaceans have a single-chambered heart.
E) The heart is stimulated to beat by nerve impulses.