46
9982-1001256
9982-1001257
9982-1000320
9982-1001259
9982-1002501
3 B S c i e n t i f i c ® B i o l o g y
Anatomi ca l Mode l Human
Embryonic Development, 12 stages
• Ovule shortly after fertilization
• Two cell stage
• Four cell stage
• Seven cell stage
• Morula stage
• Blastocyst with trophoblast and embryoblast
• Blastocyst with early formation
of embryo process
• Blastocyst with start of implantation
• Embryo (approx. 12th day)
• Embryo (approx. 20th day)
• Embryo (approx. 28th day)
• Embryo (approx. 2nd month)
The first 8 models are enlarged approx. 4,000 times, the other 4 models
are enlarged approx. 4-5 times. The first 8 stages can be removed from
the baseboard for closer study. Delivered in storage carton.
12x59x41 cm; 3.35 kg
L/D/E/F/S
9982-1001256
Embryonic Development in 12 stages
The model represents the development of the human germ cells from ferti-
lisation until the end of the 2nd month of pregnancy in 12 stages. Each
stage can be removed from the common stand as an individual part and
can be remove used for teaching and tests for the embryological specialist
field.
• Ovum at time of fertilisation (conception) with male gamete (sperm)
• Zygote at 2-cell stage, approx. 30 hours after fertilisation
• Zygote at 4-cell stage, after around 40-50 hours
• Zygote at 8-cell stage, after around 55 hours
• Morula
• Blastocyst after around 4, 5 and 8-9 days
• Germ cells at approx. 11th day and approx. 20th day
• Embryo at around the end of the 1st and 2nd month of pregnancy
65x6x34.5 cm; 1.55 kg
L/E/D/S/F/P/I/J/R/C
9982-1001257
Stages of Fertilisation and Development of the Embryo,
2 times magnified
The model illustrates schematically how the ovum matures, how ovulation
and fertilisation occur and how the fertilised ovum develops to the stage
where it embeds itself in the uterine wall to begin the growth
into an embryo. The various stages are shown in larger-than-
life model form in ovary, fallopian tube. An even more
enlarged illustration of each is also printed on the base.
Supplied on a base.
35x21x20 cm, 1.2 kg
L/D/E/S/P/I/J www.
9982-1000320
Embryo Development,
12 stages
With the common frog as an exam-
ple (Rana temporaria), the different
stages of the embryo development
are shown 30 times magnified.
9982-1002501
Labour Stages Model
Same as 9982-1001258, but reduced in size to 50%. Supplied on baseboard.
40x31x13 cm; 1.4 kg
9982-1001259
Reproduc t ion and Deve lopment
