1) By what type of cell division does the fertilised egg divide? a) Mitosis b) Meiosis 2) What name is given to the solid ball of cells formed from the zygote? a) Zygote b) Embryo c) Morula d) Blastocyst 3) What name is given to the hollow ball of cells formed from the morula? a) Zygote b) Embryo c) Morula d) Blastocyst 4) From what layer does the foetus develop? a) Trophoblast b) Inner cell mass c) Amnion d) Placenta 5) From what layer does the amniotic sac develop? a) Trophoblast b) Inner cell mass c) Placenta 6) What is the function of the amniotic fluid? a) Shock absorber b) Transports dissolved materials 7) What is the function of the placenta? a) Shock absorber b) Transports dissolved materials 8) From what two tissues is the placenta formed? a) Amnion & Trophoblast b) Endometrium & Chorion c) Endometrium & Amnion d) Trophoblast & Chorion 9) Where does the embryo implant? a) Fallopian tube b) Endometrium c) Ovary d) Vagina 10) Where does fertilisation happen? a) Fallopian tube b) Endometrium c) Ovary d) Vagina 11) From what layer does the skin & nervous system develop? a) Endoderm b) Ectoderm c) Mesoderm d) Coelom 12) From what layer does the digestive system develop? a) Endoderm b) Ectoderm c) Mesoderm d) Coelom 13) From what layer does the circulation system (heart & lungs) develop? a) Endoderm b) Ectoderm c) Mesoderm d) Coelom 14) From what layer does the skeletal system develop? a) Endoderm b) Ectoderm c) Mesoderm d) Coelom

Embryo development LC

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