The embryo is less than a millimeter, but still does not look like a human. Only a disc consists of three layers of cells which will lead to different body tissues. The innermost layer (endoderm) will form the respiratory and digestive systems. The middle layer (mesoderm,) will form the bones, most of the muscles, cartilage, sexual organs, kidneys and circulatory system. The outer layer (ectoderm) develop skin, hair and the system nervous.
This disc is folded to resemble a tube with two bumps at the ends, one of which will be the baby's head.
central nervous system, heart, skeleton and muscles are in their earliest stage of development.
This week, the heart becomes bigger and begins to pump blood. The head of the embryo is very large compared to the rest of the body. Has a tail that gradually shrinks until it disappears in the next three weeks. Appear also the beginning of the arms. Also the legs appear a little later, while the eyes and ears.
At the beginning of the fourth week, the cells that form the somites are modified, forming a tissue called connective tissue, which arise later cartilage-forming cells (chondroblasts), bone (osteoblasts) and supporting tissues (fibroblasts). Also give rise to the myotomes (which will be derived muscle) and dermatomal (of which will form the dermis and subcutaneous tissue).
At the end of the fourth week, the head is easily recognized, which already has a rudimentary brain, begin to recognize also the arms and legs. That emotion caudno
a mother knows that if a child is developing slowly, encourage and is giving love ...
This disc is folded to resemble a tube with two bumps at the ends, one of which will be the baby's head.
central nervous system, heart, skeleton and muscles are in their earliest stage of development.
This week, the heart becomes bigger and begins to pump blood. The head of the embryo is very large compared to the rest of the body. Has a tail that gradually shrinks until it disappears in the next three weeks. Appear also the beginning of the arms. Also the legs appear a little later, while the eyes and ears.
At the beginning of the fourth week, the cells that form the somites are modified, forming a tissue called connective tissue, which arise later cartilage-forming cells (chondroblasts), bone (osteoblasts) and supporting tissues (fibroblasts). Also give rise to the myotomes (which will be derived muscle) and dermatomal (of which will form the dermis and subcutaneous tissue). At the end of the fourth week, the head is easily recognized, which already has a rudimentary brain, begin to recognize also the arms and legs. That emotion caudno
a mother knows that if a child is developing slowly, encourage and is giving love ...
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