Wednesday, September 21, 2011

Week 5 {Development}

Baby Suarez is officially here!

Deep inside Mommy, our baby embryo is growing at a furious pace. At this point, he's about the size of a sesame seed, and he looks more like a tiny tadpole than a human. He's now made up of three layers—the ectoderm, the mesoderm, and the endoderm—which will later form all of his organs and tissues.

The neural tube—from which Baby Suarez’s brain, spinal cord, nerves, and backbone will sprout—is starting to develop in the top layer, called the ectoderm. This layer will also give rise to his skin, hair, nails, mammary and sweat glands, and tooth enamel.

His heart and circulatory system begin to form in the middle layer, or mesoderm.  In fact, this week his tiny heart begins to divide into chambers to beat and pump blood. The mesoderm will also form your Baby Suarez’s muscles, cartilage, bone, and subcutaneous (under skin) tissue. The third layer, or endoderm, will house his lungs, intestines, and rudimentary urinary system, as well as his thyroid, liver, and pancreas.

In the meantime, the primitive placenta and umbilical cord, which deliver nourishment and oxygen to Baby Suarez, are already on the job.

Now, it’s time to tell Daddy!

{Info from}

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