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 for prenatal development?
There are three stages of prenatal development:
germinal, embryonic, and fetal
.
What are the 3 periods of prenatal development?
This union marks the beginning of the prenatal period, which in humans encompasses three distinct stages: (1) the pre-embryonic stage, the first two weeks of development, which is a period of cell division and initial differentiation (cell maturation),
(2) the embryonic period, or period of organogenesis, which lasts
…
What is the correct order of prenatal development quizlet?
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 5 stages of conception?
- Conception: From Egg to Embryo. …
- Ovulation. …
- Moving Into the Fallopian Tube. …
- The Sperm’s Long Journey. …
- Fertilization: Sperm Penetrates Egg. …
- The Cells Start to Divide. …
- Implantation. …
- Pregnancy Hormones.
What are the 4 stages of embryonic development?
- 1.1 Fertilization.
- 1.2 Cleavage.
- 1.3 Blastulation.
- 1.4 Implantation.
- 1.5 Embryonic disc.
What are the stages of prenatal development in psychology?
There are three stages of prenatal development—
germinal, embryonic, and fetal
.
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.
What are the 9 stages of pregnancy?
- Amniocentesis.
- First Trimester Health.
- First Trimester Tests.
- Second Trimester Health.
- Second Trimester Tests.
- Third Trimester Health.
- Third Trimester Tests.
- Ultrasound.
What is the embryo period?
After conception, your baby begins a period of dramatic change known as the embryonic stage. This stage runs
from the 5th through the 10th week of pregnancy
. During this stage, the baby is called an embryo.
What are the 6 stages of embryonic development in order?
- F. Fertilization- 12-24 hours after implantation.
- C. Cleavage- a series of mitotic cell division convert zygote into multicellular embryo.
- M. Morula- cells become a solid ball.
- B. Blastula- fluid filled cluster of cells, inner cell mast develops.
- G. Gastruela- 3 primary germ layers form.
- N.
What is the correct order of events in fertilization?
The stages of fertilization can be divided into four processes: 1) sperm preparation, 2) sperm-egg recognition and binding, 3) sperm-egg fusion and 4) fusion of sperm and egg pronuclei and activation of the zygote.
What are the 4 stages of embryonic development quizlet?
- Cleavage. 1st stage. …
- blastulation. 2nd stage. …
- gastrulation. 3rd stage. …
- neurulation. 4th stage. …
- neural tube. Fetal tissue that develops into the central nervous system.
- morula. When the embryo is 16 to 32 cells. …
- hCG. HUMAN CHORIONIC GONADOTROPIN–hormone produced by placenta. …
- Zygote.
What is the second stage of prenatal development?
Embryonic Stage
. The second stage of gestation, the embryonic stage, lasts from the implantation of the blastocyst on the uterine wall until approximately the eighth week of pregnancy. During this time, the embryo’s cells continue to multiply and begin to differentiate to form various body tissues and organs [3].
When does the prenatal period begin quizlet?
The embryonic period of prenatal development occurs from
week 3 until week 8
.
What is the most sensitive period of 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). This is also referred to as the first trimester.
What are the 7 stages of development?
There are seven stages a human moves through during his or her life span. These stages include
infancy, early childhood, middle childhood, adolescence, early adulthood, middle adulthood and old age
.
Which of the following is the first stage in embryonic development?
The first stage of embryonic development is
the fusion of egg and sperm to form a zygote
. This step is known as fertilization.
What are the main periods of development that were discussed in the introduction reading?
- Stage 1: The Emergent Pre-reader (typically between 6 months to 6 years old) (back to top) …
- Stage 2: The Novice Reader (typically between 6 to 7 years old) (back to top) …
- Stage 3: The Decoding Reader (typically between 7 – 9 years old) (back to top)
What is the first stage in embryonic development?
In the first stages of embryonic development, a single-celled zygote undergoes many rapid cell divisions, called cleavage, to form
a blastula
, which looks similar to a ball of cells. Next, the cells in a blastula-stage embryo start rearranging themselves into layers in a process called gastrulation.
During which stage of prenatal development is the morula formed quizlet?
The morula stage occurs
3-4 days after fertilization
, just as the early embryo enters the uterus. 2. Soon the blastocystic cavity develops inside it (fluid-filled cavity).
What are the stages of blastocyst formation?
The processes of formation are called
gastrulation, neurulation, and organogenesis
. Formed by the cleavage of zygote. Formed from the inner cell mass of the blastocyst.
Which of the following is the correct sequence of events that take place after the fertilized egg reaches the uterus?
Graafian Follicle, Ovum, Fallopian Tube, Uterus.
Which is the correct pathway of the egg?
The ovaries produce the egg cells, called the ova or oocytes. The oocytes are then transported to
the fallopian tube
where fertilization by a sperm may occur. The fertilized egg then moves to the uterus, where the uterine lining has thickened in response to the normal hormones of the reproductive cycle.
How long is the prenatal period?
The average length of time for prenatal development to complete is
38 weeks from the date of conception
. During this time, a single-celled zygote develops in a series of stages into a full-term baby.
