11.1 Outline the major events of the three stages of prenatal development.
Prenatal development proceeds through the germinal (first 2 weeks), embryonic (2 weeks to 2 months), and fetal stages (2 months to birth)
as the zygote is differentiated into a human organism.
What are the 3 stages of prenatal development quizlet?
This period is generally divided into three stages:
the germinal stage, the embryonic stage, and the fetal stage
.
What are the 3 main stages of prenatal development?
There are three stages of prenatal development:
germinal, embryonic, and fetal
.
What is the order of prenatal development quizlet?
The correct sequence of prenatal development is:
embryonic period, fetal period, germinal period
.
What are the three stages of prenatal development and what happens during each stage?
The process of prenatal development occurs in three main stages. The first two weeks after conception are known as the germinal stage,
the third through the eighth week is known
as the embryonic period, and the time from the ninth week until birth is known as the fetal period.
What is the correct order of prenatal development?
There are three stages of prenatal development:
germinal, embryonic, and fetal
.
What happens in the fetal stage?
Stages of development: During the fetal stage,
the brain develops and the body adds size and weight
, until the fetus reaches full-term development. Throughout the fetal stage the brain continues to grow and develop, nearly doubling in size from weeks 16 to 28.
Which period of prenatal development is the most critical?
The embryonic period
is the most critical period of development because of the formation of internal and external structures.
During which week of pregnancy do ears and eyes form?
Eight weeks into
your pregnancy, or six weeks after conception, your baby’s lower limb buds take on the shape of paddles. Fingers have begun to form. Small swellings outlining the future shell-shaped parts of your baby’s ears develop and the eyes become obvious.
Which is the most sensitive period in prenatal development?
In general, major defects of the body and internal organs are more likely to occur
between 3 to 12 embryo / fetal weeks
. This is the same as 5 to 14 gestational weeks (weeks since the first day of your last period).
What are the factors that affect prenatal development?
Prenatal risk factors include
chronic maternal illness, certain maternal infections, toxin exposures and nutritional deficiencies
. Risk factors in the perinatal period include pregnancy-related complications, prematurity and low birth weight, and infection exposure during pregnancy or at time of birth.
What is pre natal stage?
prenatal development, also called antenatal development, in humans, the
process encompassing the period from the formation of an embryo, through the development of a fetus, to birth (or parturition)
. Human Fetus; Prenatal Development.
What are the developmental stages?
There are three broad stages of development:
early childhood, middle childhood, and adolescence
. They are defined by the primary tasks of development in each stage.
At what stage does the umbilical cord develop?
The umbilical cord is the vital connection between the fetus and the placenta. Umbilical cord development begins in the
embryologic period around week 3
with the formation of the connecting stalk.
What is the longest stage of prenatal development quizlet?
What is the longest stage of prenatal development?
The fetal stage
.
When during prenatal development does the placenta begin to form quizlet?
The placenta is attached to the wall of the uterus. The process, beginning
about 10 days after conception
, in which the developing organism burrows into the placenta that lines the uterus, where it can be nourished and protected as it continues to develop.
