What is Embryonic development or Embryogenesis?

जागरण:

EMBRYOGENESIS  -

  "Embryogenesis  is the developing stage of a zygote in an embryo."

The process through  which embryo is identified in a complete organism.

The steps of embryonic development is given below.

1. CLEAVAGES ARE THE MITOSIS DIVISION  OF ZYGOTES AND FORMATION OF BLASTOMERES WHICH CAN DIFFERENTIATE IN MICHROMERE AND MEGAMERE.

2. EVENT OF MORULA CAN BE DEFINED AS THE CONTINUOUS PROCESS OF CLEVAGE UP TO 16 BLASTOMERES .

3. IMPLANTATION IS THE ATTACHMENT OF EMBRYO WITHIN THE WALL OF UTERUS IS CALLED IMPLANTATION.)

3. GASTRULATION IS THE PROCESS IS OF GERM LAYERS IN WHICH BLASTULA, A SINGLE LAYERED EMBRYO GET CHANGED IN GASTRULA WHICH IS A TRIPLE LAYERED EMBRYO.

THE LAYERS CAN BE DIFFERENTIATE IN ENDODERM, MESODERM AND ECTODERM.

ENDODERM FORM DIGESTIVE SYSTEM AND IT'S GLANDS.

MESODERM FORM MUSCLES, BONES, HEART AND OTHER INTERNAL ORGANS.

ECTODERM FORM THE SKIN AND NERVOUS SYSTEM.

5. NEURULATION IS KNOWN AS THE PROCESS OF NERVOUS SYSTEM IN EMBRYO IS KNOWN AS NEURULATION.

THESE ARE THE MOST ESSENTIAL PROCESS OF EMBRYONIC DEVELOPMENT.

AFTER THESE PROCESSES IN 5TH WEAK HEART AND RESPIRATORY SYSTEM ARE FORMED.

IN 6TH WEAK FORMATION OF NOSE, EYES AND EARS TAKE PLACE.

 

AND IN 7TH TO 8TH WEAK BRAIN FORMATION TAKES PLACE.