Doctor Kryskowski: The autosomal dominant mode of inheritance and symptoms found in the patients from this family indicate that they suffer
from Marfan syndrome. It is an inherited disorder caused by mutations
in the FBN1 gene. What is the most feasible (easiest, cheapest, most
reliable) way to investigate if this is the correct diagnosis?

answer; the correct answer is desert plants;

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

i thinking chemical change