The principle of states that, in an undisturbed sequence, the oldest rocks are at the bottom of the sequence and successive layers are younger than those

below them

A;Lateral Continuity
B;Super position
c;Inclusions
d;Original Horizontality

The principle of states that, in an undisturbed sequence, the oldest

rocks are at the bottom of the sequence and successive layers are younger than those

below them

A;Lateral Continuity

B;Super position

c;Inclusions

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.