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The Human Morula

3 days

From The Biology of Prenatal Development.Buy Now

Note:

Some say I look like a tiny bunch of grapes. I know I look great! (3 days)

Note:

Although my cells have divided several times, my overall size is still about the same. However, that will soon change.

Label Key:

  • 1. The protective covering (zona pellucida) is still intact.
  • 2. group of cells

All ages referenced to fertilization, not last menstrual period.
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The Human Morula
The Human Morula
( 3 days)
Blastocyst with Inner Cell Mass
Blastocyst with Inner Cell Mass
( 5 days)
Embryo at About 11 Days
Embryo at About 11 Days
( 11 days)
Germ Layers of the Embryo
Germ Layers of the Embryo
( 14 days)
Tube-Shaped Heart
Tube-Shaped Heart
( 3 weeks)
Three-Week Embryo
Three-Week Embryo
( 3 weeks)
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