Embryonic Development - Up To Week 8 Flashcards
What happens within the first four weeks after fertilisation?
(3)
The heart forms and starts to beat in the embryo
The brain develops
The umbilical cord forms
What has happened by the fifth week?
The internal organs and the limbs have started to form
What has happened by the sixth week?
The eyes are visible and the mouth, nose and ears are forming
What has happened by the eight week?
6
The tail has diminished
The face is human
The major body organs are formed
Ovaries or testes are distinguishable
Bone is beginning to replace cartilage
Recognisable as a human and is called a foetus
By what week is the embryo now called the foetus?
By week eight
What is the embryo called after week eight?
A foetus
When does the heart form and start to beat in the embryo?
Within the first four weeks after fertilisation
When does the brain develop?
Within the first four weeks after fertilisation
When does the umbilical cord develop?
Within the first four weeks after fertilisation
When do the internal organs and limbs start to form?
Within the first five weeks
When do the eyes become visible?
Within the first six weeks
When do the mouth, nose and ears begin to form?
Within the first six weeks
By what week has the tail diminished?
Within the first eight weeks
When does the face become recognisably human?
Within the first eight weeks
When do the ovaries or testes become distinguishable?
Within the first eight weeks
