What does the word petrified mean?

verb (used with object), pet·ri·fied, pet·ri·fy·ing.

to convert into stone or a stony substance.

to benumb or paralyze with astonishment, horror, or other strong emotion:

I was petrified with fear.

to make rigid or inert; harden; deaden:

The tragedy in his life petrified his emotions.

verb (used without object), pet·ri·fied, pet·ri·fy·ing.

to become petrified.

Explanation:

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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.