Why is a wall on a ship called a bulkhead??

Question

Why is a wall on a ship called a bulkhead??

Answer 1

The word bulk means a lot and the word head contains the brain so in summary the bulkhead on a boat is where the big brain is hope this clears up all your queries

Answer 2

The word bulki meant "cargo" in Old Norse. Sometime in the 15th century sailors and builders realized that walls within a vessel would prevent cargo from shifting during passage. In shipbuilding, any vertical panel was called a "head." So walls installed abeam (side-to-side) in a vessel's hull were called "bulkheads." Now, by extension, the term applies to every vertical panel aboardship, except for the hull itself.