Stages of Prenatal Development
- Germinal Stage. The germinal stage begins at conception when the sperm and egg cell unite in one of the two fallopian tubes.
- Embryonic Stage. At this point, the mass of cells is now known as an embryo. ...
- Fetal Stage. Once cell differentiation is mostly complete, the embryo enters the next stage and becomes known as a fetus.
What are the three stages of prenatal development?
- Ectoderm: Skin and nervous system
- Endoderm: Digestive and respiratory systems
- Mesoderm: Muscle and skeletal systems
What are the 4 stages of pregnancy?
What are the 4 stages of pregnancy?
- First stage of labor. Thinning (effacement) and opening (dilation) of the cervix.
- Second stage of labor. Your baby moves through the birth canal.
- Third stage of labor. Afterbirth.
- Fourth stage of labor. Recovery.
What are the stages of pregnancy development?
- First trimester – conception to 12 weeks
- Second trimester – 12 to 24 weeks
- Third trimester – 24 to 40 weeks.
What is the fetal stage of prenatal development?
- Facial development continues. The eyelids form, the ears move toward their final position on the sides of the head, and tooth buds appear.
- Fine, colorless hair called lanugo starts to grow on the fetus’s face. ...
- The thyroid gland matures and starts producing thyroid hormones. ...
- The kidneys start functioning. ...
- The fetus is very active. ...
What is the correct order of stages in 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 major stages 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 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 is the correct order of development during the embryonic period quizlet?
(1) Answers should include three distinct events in order: (1) the zygote rapidly divides and enters the uterus about 3 days later; (2) the blastocyst forms; and (3) the blastocyst develops projections, and roughly 14 days after fertilization, fully implants into the uterine wall.
What happens to the heart during fetal development?
A faint heart pulse forms, as well as stumps where the arms and legs later develop. During the fetal stage, the neural tube turns into a brain, the blood ves sels that formed a pulse develop into a heart and sex organs begin to differentiate between male and female.
How long does the germinal stage last?
The germinal stage lasts just two weeks. The embryonic stage lasts six weeks, and the fetal stage is the longest, occurring from the ninth week of pregnancy until the baby is born.
What happens to the uterus after the egg is implanted?
Once the egg has implanted itself within the uterus, a woman's hormones respond to its presence and cause her regular menstrual cycle to stop for the remainder of the pregnancy . In the embryonic stage, the embryo begins to develop a neural tube, a head, eyes, a nose, ears and a mouth.
How many stages of prenatal development are there?
There are three stages of prenatal development: germinal, embryonic, and fetal. Prenatal development is also organized into three equal trimesters that do not correspond with the three stages. The germinal stage occurs from conception until 2 weeks (implantation), during which the zygote begins to rapidly divide. ...
What is the prenatal period?
Prenatal Development. Development happens quickly during the prenatal period, which is the time between conception and birth. This period is generally divided into three stages: the germinal stage, the embryonic stage, and the fetal stage. The two-week period after conception is called the germinal stage. Also, what events mark the beginning and ...
What is the two week period after conception called?
The two-week period after conception is called the germinal stage. Also, what events mark the beginning and end of each prenatal stage? Prenatal development is divided into three different categories of development. The first 2 weeks of development is the germinal period.
What is the process of human development?
Human development is a predictable process that moves through the stages of infancy, childhood, adolescence, and adulthood. In infancy, we rely on others to meet our needs as we begin to gain control over our bodies. In childhood, we begin to develop our sense of independence and learn what we can and cannot do.
When does the germinal period begin?
The first 2 weeks of development is the germinal period. The germinal period begins with conception and ends when the blastocyst is fully implanted into uterine tissue.
Stages of Prenatal Development
A new baby is being born. But, just how did this baby get to this point? Many events had to take place before the baby got to the point of ready to be born into this world. A baby starts from a single cell and then developments into a full baby.
Germinal Stage of Prenatal Development
During the process of meiosis, a female creates an ovum that has 23 chromosomes, and a male creates a sperm that has 23 chromosomes. Fertilization happens when the male's sperm penetrates the female's ovum to create the initial cell that has 46 chromosomes. This event begins the start of prenatal development with the germinal period.
Embryonic Stage of Prenatal Development
The embryonic stage of development is the period that begins once implantation has occurred. The embryo continues with the process of mitosis to create more and more cells. An embryo contains cells that carry out more specific functions that what is seen in a zygote. However, it does not yet have the functioning organs that are seen in a fetus.
An Informative Pamphlet for Parents
In this activity, students are going to apply the knowledge they learned in the lesson to write an informative pamphlet for prospective parents. The pamphlet should take the form of a trifold brochure and should use language that is accessible to a general audience.
What is the period of development from conception until birth?
Prenatal development. the period of development from conception until birth. germinal, embryonic, and fetal stages. Stages of prenatal development. Germinal stage. 1st stage of prenatal developmental. Time: 2 weeks. Begins at conception when the sperm and egg cells fuse in a fallopian tube.
How long does it take for an embryo to develop?
Embryo weighs one gram and is one inch in length; has amniotic sac, placenta, and umbilical cord. embryo. the developing human organism from about 2 weeks after fertilization through the second month; organs begin to develop.
What is the process of conception?
conception. A single sperm cell penetrates the outer coating of the egg cell and fuses to form one fertilized cell. The ectoderm (skin and nervous systems), endoderm (digestive and respiratory systems), and mesoderm (muscle and skeletal systems). The blastocyst is made up of three layers:
How long does it take for a zygote to divide?
The fertilized egg (single-celled zygote) moves to the uterus. Cell division (lasts 14 days) begins 24 to 36 hours after conception. Through the process of mitosis, the zygote first divides into two cells, then into four, and so on.