alligators
Compounds, that's how it's called
a compound is what i thank to i learned that in 5th grade.
The heart is composed of four chambers - ONE of each: right atrium, RIGHT VENTRICLE, left atrium and left ventricle.
Many of the planets have more than one element. Two of these planets that have more than one element are Earth and Jupiter.
The atrium. (Plural: atria.)
more than one lynx is call lynxes
you call them possums if your talking about more than 1
More than one fisherman is fishermen
More than one platypus is two or more platypuses. The plural is not 'platypi'.
alligators
swans
Fish
Ants
Pegasi I think.
Vampiresses.
Polygamy.