Answer:
The thoracic cavity
Explanation:
The thoracic cavity is the anterior ventral body cavity found within the rib cage in the torso. It houses the primary organs of the cardiovascular and respiratory systems, such as the heart and lungs, but also includes organs from other systems, such as the esophagus and the thymus gland.
Blood borne transmitted diseases can be
easily traced back to its sources as they need a physical medium to transfer
which we can measure, calculate, contain and treat while air borne transmitted
diseases lack this feature. The microorganism do not need a physical medium to transfer
from one host to another making it difficult to contain the virus.