Embryology is the branch of biology that studies the prenatal development of gametes, fertilization, and development of embryos and foetuses. Additionally, embryology encompasses the study of congenital disorders that occur before birth, known as teratology.

Embryology can be mainly studied under two main divisions. They are EMBRYOGENESIS and ORGANOGENESIS.

Embryogenesis is the process of initiation and development of an embryo from a zygote (zygotic embryogenesis) or a somatic cell (somatic embryogenesis). Embryo development occurs through an exceptionally organized sequence of cell division, enlargement and differentiation.

Studying embryogenesis can be easier if we go through the topics below.

01 GAMETOGENESIS

02 FERTILIZATION

03 IMPLANTATION

04 EMBRYONIC DISC

05 EMBRYONIC PHASE

06 FOETAL PHASE

07 FETAL MEMBRANES AND PLACENTA

08 CHROMOSOMAL AND GENE ABERRATION

ORGANOGENESIS, in embryology, the series of organized integrated processes that transforms an amorphous mass of cells into a complete organ in the developing embryo. The cells of an organ-forming region undergo differential development and movement to form an organ primordium, or anlage. Organogenesis continues until the definitive characteristics of the organ are achieved.

01 MUSCULAR SYSTEM

02 CARDIOVASCULAR SYSTEM

03 BLOOD AND LYMPHATIC TISSUES

04 RESPIRATION TRACT

05 DIGESTION TRACT

06 URINARY SYSTEM

07 GENITAL SYSTEM

08 NERVOUS SYSTEM

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