The correct sequence of prenatal development is: embryonic period, fetal period, germinal period .
What is the correct course of prenatal development?
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 .
Which of the following is the correct order of prenatal development *?
There are three stages of prenatal development: germinal, embryonic, and fetal .
Which of the following stages takes place during 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 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 3 environmental factors that affect prenatal development?
Various teratogens include drugs, alcohol, tobacco, and other environmental agents. The adverse effects of a teratogen depend on several factors, such as the dose or level of exposure, heredity, age of the teratogen, and any other negative influences .
What are the factors affecting 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 the correct order of the development of the following?
Fertilization → Zygote → Cleavage → Morula → Blastula → Gastrula.
What is cognitive development in prenatal stage?
The human brain is intricately designed to execute cognitive functions, such as perception, attention, action, memory and learning. The complete nervous system is active during prenatal development and the aim of this review is to present data on fetal cognitive functions.
What is the pre embryonic stage?
The first 2 weeks of prenatal development are referred to as the pre-embryonic stage. A developing human is referred to as an embryo during weeks 3–8, and a fetus from the ninth week of gestation until birth.
What are the 3 main stages of prenatal development?
There are three stages of prenatal development: germinal, embryonic, and fetal .
What is the prenatal period of development quizlet?
period of prenatal development, from about the eighth week after conception to birth , marked by rapid growth and preparation of body systems for functioning in the postnatal environment. label typically applied to the developing human organism from about eight weeks after conception until birth.
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.
What happens during the germinal stage?
The germinal period (about 14 days in length) lasts from conception to implantation of the zygote (fertilized egg) in the lining of the uterus . During this time, the organism begins cell division and growth. After the fourth doubling, differentiation of the cells begins to occur as well.
What is prenatal development How long does it take?
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. The three primary stages of prenatal development are the germinal stage, the embryonic stage, and the fetal stage.
