Cytoplasm is all material (organelles, enzymes, fluid) inside of the cell membrane, except for the nucleus, which has it's own membrane and nucleoplasm within.
B. the oceans is the largest ecosystem.
Answer:
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The function of the PNS (Peripheral Nervous System) is to connect the CNS (Central Nervous System) to the limbs and organs, basically serving as a communication center going back and forth between the spinal cord, the brain, and the rest of the body.
The firsy one does both oxygenated and deoxygenated blood use the umbilical artery
