Embryonic Growth and Development

Question 1

What is an embryo?

Answer 1

A fertilised egg from conception to when it is a recognisable organism.

Question 2

When is the baby referred to as a foetus?

Answer 2

From 8-9 weeks&raquo_space;> end of pregnancy

Question 3

What are the 3 stages of the embryo?

Answer 3

Zygote, Morula and Blastula

Question 4

What days is it called a zygote?

Answer 4

Days 0-2

Question 5

What days is it called a morula?

Answer 5

Days 3-4

Question 6

What days is it called a blastula?

Answer 6

Days 5-9

Question 7

What is another name for blastula?

Answer 7

Blastocyst

Question 8

What is a zygote?

Answer 8

First diploid cell

Question 9

What is the protective lining around the embryo up until implantation?

Answer 9

Zona pellucida

Question 10

How many cells is a morula made up of?

Answer 10

8-15

Question 11

What does morula mean?

Answer 11

Latin, meaning mulberry

Question 12

What is the outer part of the blastula called?

Answer 12

Outer trophoblast - eventually forms placenta

Question 13

What is the inner part of the blastula?

Answer 13

Inner cell mass - “embryoblast”

Question 14

What is a blastocoel?

Answer 14

Fluid-filled cavity