"Medical Entrance Exam" joke

Santa Applied to a medical college But he never made it because, these were his Answers:

Antibody:
One who hates his body

Artery:
Study of fine paintings

Bacteria:
Back door of a cafeteria

Coma:
Punctuation Mark

Gall Bladder:
Bladder of a girl

Genes:
Blue Denim

Labour pain:
Hurt at work