Answer:
Structure and Function. In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
Organs are groups of tissues that work together to perform a particular body function. Tissues and organs are specialized for particular body functions.
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The nervous system of a crab differs from that of vertebrates (mammals, birds, fish, etc.) in that it has a dorsal ganglion (brain) and a ventral ganglion. ... The ventral ganglion is located beneath the internal organs, between the legs.
Answer:
in two layers
Explanation:
their called the lipid bilayer