Which ocean surrounds antarctica at the south pole?
arctic ocean
indian ocean
atlantic ocean
southern ocean

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

Spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Which blood cell spend most of their time in the lymphatic system?