First it's a embryo until the 10th week, after that it's a fully formed but small fetus.
true the first "long bones" in fetus are formed of hyaline cartilage
The heart is the first organ to develop in a fetus. Together, blood and the circulatory system, that is powered by the heart, form the first organ system.
Independent '''Group''' (IG),
Fetus
A Foetus is formed by the growth and development of an embryo.
a fetus
fetus
All organs of the Fetus are formed during first three months of Pregnancy. So drugs taken during this period have high chances of 'Structural' damage to the Fetus. Afterward 'Functional' damage can occur.So your Doctor will be very careful about drugs given in First Trimester ofPregnancy.
The embryonic period extends to the end of the eight week. After the embryonic period (8weeks), the developing human is called a fetus.
It will grow and develop until fully formed.
For the first 8 weeks the developing human is called an embryo after that it is called a fetus.