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In the ball sack area
urinary system , reproductive system, tongue, intestines, and crystal ball.
The vas deferens, prostate, bulbourethral gland, and seminal vesicles are the internal organs of the male reproductive system.
A solid ball of cells is called a morula. A morula is an embryo that is at an early stage of embryonic development.
the morula develops into a hollow, fluid-filled ball of cells called a blastocyst.
Blastrulation
When an embryo (fertilized egg) reaches the uterus, it is a hollow ball of about 100 cells called a blastocyst.
the hollow ball of cells is called the Blastocyst. At which point this occurs depends on the particular species.
Blastocyst.
the male testes are protected by the scrotum. a layer of skin covering the "ball sack".
Blastocyst
it is called a blastocyst