Page 101 - The Miracle of Human Creation

ectoderm mesoderm endoderm

epidermis cartilage connec-
tive tissue

brain pharynx
thyroid gland
gonads
glands
cartilage parathyroid
neuron tissue cell gland
keratinous
cell
digestion lung
striated
spinal cord muscle
tissue
neuron
adrenal gland tracheal
(cortex) tubular cell cell
milk-secreting
glands light-sensing pancreas
cells heart

epithelial
lymphatic smooth cell
tissue muscle tissue endocrine
adrenal
medulla gland cell
liver
red
endothelial blood cell
pigment cell
cell
In the first stages of birth, the cells make exact copies of themselves. If this multiplication were not controlled,
a human being would not be formed; rather, a large piece of flesh composed of identical cells would be the re-
sult. But such is not the case. Identical stem cells later begin to differentiate. As a result of this differentiation,
bones, smooth muscles, epithelium, the liver, the lungs, in short, all the body's cells and tissues are formed.
Surely it is the knowledge and incomparable power of God which brings these wondrous transformations in the
cells to pass, and ensures the presence of those special elements that make a person a person.