Anatomical landmarks are often used as part of the name of a structure to show where that structure is located in the body. what area of the body does the term brachium refer to?

Brachium usually represents the upper part of the arm. So, the brachium reffers to region from the shoulder to the elbow. This term can also be used to describe animal part, such as a wing or some armlike part (a branching).

chordata is the answer

the median of the data is 4.5.