Name the Two Upper Abdominal Quadrants and List the Organs

question 24

Essay

Name the two upper abdominal quadrants and list the organs that lie in each.

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Definitions:

Paleozoic

An era in the geologic time scale, occurring from about 541 million to 252 million years ago, noted for the early development of life on Earth.

Crinoids

Marine animals belonging to the class Crinoidea, characterized by a mouth on the top surface surrounded by feeding arms, part of the echinoderm phylum.

Trilobites

Extinct marine arthropods with a segmented body and calcified exoskeleton, prevalent from the Cambrian to the Permian period.

Cambrian Explosion

The widespread, relatively rapid appearance of diverse types of hard-shelled organisms near the beginning of the Cambrian Period.