This house has been lived in by successive generations of the family.

This sinusoid is a channel for carrying venous blood.

I love eating shellfish.

He is receiving treatment for scrofula.

He is a direct descendant of that family.

Lichens can survive even in harsh environments.

Birds of prey capture their prey with their sharp vision and powerful claws.

Mammals can maintain a constant body temperature.

In mathematics, equivalence classes are a very important concept.

Insects are an important part of the natural world.