BIOL 1410 (Lab 1) Cytology + Early stages

Image review + questions on lab models

Identify the structures labelled 1-9

1 (Cell membrane), 2 (Rough ER), 3 (Chromatin), 4 (Centrioles), 5 (Golgi apparatus), 6 (Smooth ER), 7 (Mitochondria), 8 (Nucleolus), 9 (Nucleus/nuclear membrane)

Identify the structures labelled 10-14

10 (Chromatin), 11 (Cell membrane/plant cell wall), 12 (Nucleolus), 13 (Nucleus/nuclear membrane), 14 (Cytoplasm)

Identify the structures labelled 15-19

15 (Rough ER), 16 (Cell membrane), 17 (Mitochondria), 18 (Chromatin), 19 (Nuclear membrane)

Identify the structures labelled 20-22

20 (Chromatin), 21 (Nuclear membrane), 22 (Nucleolus)

Identify the structures labelled 23-30 (25 + 30 represent the same structure)

23 (4 cell stage), 24 (Morula), 25 (Trophoblast), 26 (Embryoblast), 27 (Blastocyst), 28 (Epiblast), 29 (Hypoblast), 30 (Trophoblast)

Identify the structure labelled as 31

31 (Blastocyst [exterior])

Identify the structures of a ~9-12 day embryo labelled 32-36

32 (Amniotic cavity), 33 (Bi-layered embryonic disc), 34 (Yolk sac), 35 (Epiblast), 36 (Hypoblast), 37 (Trophoblast cells)

Identify the structures of a ~20 day embryo labelled 38-44

38 (Chorionic villi), 39 (Yolk sac), 40 (Umbilical cord), 41 (Chorion), 42 (Amnion), 43 (Embryo), 44 (Amniotic cavity)

Identify the structures of a ~25 day embryo labelled 45-53

45 (Chorion), 46 (Yolk sac), 47 (Umbilical cord), 48 (Chorionic villi), 49 (Embryo’s head), 50 (Amnion), 51 (Embryo’s heart), 52 (Amniotic cavity), 53 (Embryo’s tail)

Identify the structures of a ~4.5 week embryo labelled 54-61

54 (Chorion), 55 (Amnion), 56 (Embryo’s head), 57 (Amniotic cavity), 58 (Umbilical cord), 59 (Yolk sac), 60 (Embryo’s heart), 61 (Embryo’s tail)

Identify the structures of a ~4.5 week embryo labelled 62-68

62 (Chorionic villi), 63 (Yolk sac), 64 (Umbilical cord), 65 (Chorion), 66 (Embryo’s head), 67 (Amniotic cavity), 68 (Embryo’s tail)