This trophoblast helps to implant the egg to the inside of the uterus. It begins to push its way into the uterine lining. Next, the trophoblast actually pulls the egg inside of the uterine wall. This trophoblast will then occupy your blood vessels and direct your blood to the fertilized egg.
Gravity, also called gravitation, is a force that exists among all material objects in the universe. For any two objects or particles having nonzero mass, the force of gravity tends to attract them toward each other. Gravity operates on objects of all sizes, from subatomic particles to clusters of galaxies.
Definition: Specific gravity is the ratio of the density of a substance to the density of water. Example: The specific gravity of pure water at 4 Â°C is 1. Specific gravity is a unitless value. Return to the Chemistry Glossary Index. Up Next. Up Next.