Question

The prenatal stage in humans is divided into Group of answer choices the neonatal period versus after the end of lactation. the neonatal period, infancy, the juvenile period, puberty, and adolescence. infancy, childhood, the juvenile period, puberty, adolescence, and adulthood. trimesters.

Answer 1

The prenatal stage in humans is divided into Trimesters.

Prenatal Development

• All the body's tissues and organs are derived from three germ layers. As the various organ systems are formed, the cells of each germ layer divide, move, aggregate, and differentiate according to fairly exact patterns.
• Ectoderm, mesoderm, and endoderm are the three layers that make up a germ. The epidermis and its appendages, pituitary gland, mammary glands, central nervous system, peripheral nervous system, epidermis, and its appendages, and subcutaneous glands are all derived from the ectoderm.
• The mesoderm is the precursor to blood cells, kidneys, gonads, spleen, bone, connective tissue, striated and smooth muscle, and the serous membrane lining of bodily cavities.
• Three main stages of prenatal human embryologic development can be distinguished: the first two weeks, the embryonic stage, and the fetal stage.

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