Ecclesiastes 11:5Viewing the 1769 King James Version. Click to switch to 1611 King James Version of Ecclesiastes 11:5
As thou knowest not what is the way of the spirit, nor how the bones do grow in the womb of her that is with child: even so thou knowest not the works of God who maketh all.
Third Week in the Womb
The blastocyst is now an embryo. This is when the baby's brain, spinal cord, heart and organs begin to form. According to Mayo Clinic, the embryo is made of three layers; first the ectoderm, which is the outermost layer of skin, the eyes, inner ear, connective tissues and the central and peripheral nervous systems. The baby's heart, bones, muscles, kidneys, and most of the reproductive system are formed in the middle layer of cells that is called the mesoderm. The baby's lungs, intestines and bladder are formed in the inner layer of cells, which is called the endoderm. According to Gerber, "A sheet of cells on the back of the embryo folds in the middle to form a tube, which will become the baby's spinal cord." At one end of this tube the brain and its major sections are formed. At the end of this week the baby is about the size of the tip of a pen.