A cell is a unit that makes up only humans.
A cell is the basic unit of structure and function in living things.
A cell are groups of animals in an area.
Cells are organisms.
Obtaining food and oxygen
Keep internal conditions stable
Human bodies have bilateral symmetry.
Animals with radial symmetry are larger and more complex than animals with bilateral symmetry.
Most animals with bilateral symmetry have sense organs in their back ends.
Bilateral symmetry allows for a streamline, balanced body that moves quickly and efficiently.