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The total energy of a particle:
Hollow Ball
A term often used to describe the structure known as a blastula, an early stage of embryonic development in animals that is a spherical layer of cells enclosing a fluid-filled cavity.
Blastula
An early stage of embryonic development in animals, characterized by a sphere of cells surrounding a fluid-filled cavity.
Male Reproductive System
The system in males responsible for producing, maintaining, and transporting sperm and semen, as well as discharging sperm within the female reproductive tract during sex.
Semen
The male reproductive fluid containing spermatozoa and various other components, used for reproduction.
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