Will the world's population continue to grow an alarming rate to the point of a disaster

Yes

Explanation:

Third world countries will keep repopulating to the point of no return and the earth will be unable to be sustained at a constant population.

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.