The best option for a donor organ would be a family member a deceased donor an artificial organ an identical twin

I'm pretty sure it a family member

the answer is: metamorphic rocks often show the presence of fossils, also a

hope i

-lavira: )

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.