Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'arterial system'?

A. The part of the cardiovascular system consisting of all arteries.
B. A developing mesenchymal capsule that covers the developing brain and spinal cord and is the precursor of the meningeal cluster. In mammals this gives rise to the arachnoid mater, pia mater and dura mater. In cyclostomes and fishes, the the concept gives rise to a single meningeal layer, the the concept.
C. A sulcus limitans of neural tube that is part of a future medulla oblongata.
D. Subdivision of skeletal system that consists of all ribs and rib joints in an organism. In many vertebrates this consists of the combination of the rib cage and all rib joints, but some vertebrates have ribs outside the thoracic rib cage.

Answer: The part of the cardiovascular system consisting of all arteries.