The left ventricle is responsible for pumping oxygenated blood throughout the entire body, which requires a lot of work and pressure, hence why it is super thick.
Autotroph.
Autotrophs are organisms that produce their own food and energy through sunlight while heterotrophs on the other hand hunt for food and cannot make their own.
Hope this helps!
Thats a false question it did not accour that many years ago
Assuming that I know the rest of this question already the answer is Haploid number of 6