Answer:
The theory of evolution is supported by instances of direct observation, the existence of homologies and fossils, and certain biogeographical patterns
Systemic circulation is the one that oxygenates all the body.
Starting from the left atrium, through the left ventricle, and the aorta and its branches to the body.
After the tissues do the exchange, the deoxygenated blood goes back to the right atrium to starts the pulmonary circulation, and then the cycle starts again.
According to cosmologists, all the (B.) Matter that exists is all that there will ever be.