I have 3 questions here about Circulatory System

1. Which one of the following structures contains blood with the greatest amount of oxygen in it?
A.Left atrium B.Right atrium
C.Right ventricle D.Left ventricle


2.Which chamber of the heart recieves blood directly to the lungs?
A.Left atrium B.Right atrium
C.Right ventricle. D.Left ventricle


and....
3.Which chamber of the heart recieves blood from all parts of the body?
A.Left atrium B.Right atrium
C.Right ventricle D.Left ventricle

For those who answer this
Thank you.....