⁃ union of sperm cell and egg cell

⁃ in FERTILIZATION produces — (fertilized egg)

⁃ zygote travels to — (will undergo 1ST MITOTIC DIVISION to form CLEAVAGES)

⁃ zygote travels — (Cleavages will transform into MORULA) Later on, it will develop into a —

⁃ process of attachment of blastocyst to the uterine wall

• - an implanted blastocyst; initial development stage of humans.

• - bond that holds the embryo to the wall of the uterus

• - embryo's lifeline; where the embryo gets its D and food from mother

• AMNIOTIC SAC a sac of thin sheet of tissue that

• - where embryo floats;

serves as shock absorber;

helps embryo to maintain temperature

• - the embryo is about 1.2 inches long

⁃ recognizable human form (—)

• - fingerprints are acquired

• - fetus moves around

• eyelashes are formed; eyelids can be recognized

• all organs have been developed.

⁃ the baby is ready to be born

HTE PROCESS OF FERTILIZATION

THE DEVELOPMENT OF THE LIFE STAGES OF EARLY EMBRYOTIC ANIMAL DEVELOPMENT

⁃ the formation of the gamete.

⁃ the first stage of animal development

⁃ SPERM AND EGG FORM AND DEVELOP inside the reproductive systems under the control of —

⁃ the next stage when the SPERM PENETRATES AN EGG then FUSION OF THEIR NUCLEUS takes place.

⁃ fertilized egg undergoes a series of MITOTIC CELL DIVISIONS

⁃ formation of early embryo.

⁃ GASTRULATION CELL MIGRATION patterns in the embryo to form two or more primary —

⁃ formation of organs in the body

⁃ process of CELL DIFFERENTIATION

⁃ the ORGANS acquire their unique STRUCTURES and CHEMICAL properties

FORMATION OF ALL MAJOR ORGANS once the germ layers have formed