Dorsal

One of my required classes in college included dissecting the entire dorsal cavity of a pig. It was disgusting.

Desert lizards have fine, granular dorsal scales.

In Paint lake during the mayfly season (July up there) their dorsal fins could be seen cutting the water everywhere.

Dromedaries have one dorsal hump.

The killer whale's dorsal fin looks good.

Camels can store a large quantity of fat in their dorsal humps.

Near-synonyms: altar screen, rood screen (not always different)