Essentials of Maternity, Newborn, and
Women's Health Nursing, 3rd Edition
Chapter 10 Fetal Development and Genetics
Study Guide with 100% Correct Answers |
Latest Update 2024 | Rated A+
teratogen - ✔✔is any substance, organism, physical agent, or deficiency state
present during gestation that is capable of inducing abnormal postnatal structure or
function by interfering with normal embryonic and fetal development
trisomies - ✔✔there is three of a particular chromosome instead of the usual
two (an entire single chromosome is added)
trophoblast - ✔✔the outer layer of cells surrounding the blastocyst cavity
,umbilical cord - ✔✔
zona pellucida - ✔✔clear protein layer that blocks other sperm from
entering ovum
zygote - ✔✔begins the process of new life
Average human pregnancy lasts for about - ✔✔280 days or 40 weeks from
the date of the last menstrual period
The three stages of fetal development during pregnancy are the: -
✔✔1.Preembryonic stage
2.Embryonic stage
3.Fetal stage
Preembryonic stage - ✔✔*fertilization through the second week
,Embryonic stage - ✔✔*end of the second week through the eighth week
Fetal stage - ✔✔*end of the eight week until birth
Fertilization - ✔✔*typically occurs around 2 weeks after the last
normal menstrual period in a 28-day cycle
*requires a timely interaction between the release of the mature ovum at
ovulation and the ejaculation of enough healthy, mobile sperm to survive the
hostile vaginal environment through which they must travel to meet the ovum
The three embryonic layers of cells formed are: - ✔✔*Ectoderm
*Mesoderm
*Endoderm
Ectoderm - ✔✔forms the central nervous system, special senses, skin, and glands
, Mesoderm - ✔✔forms the skeletal, urinary, circulatory, and reproductive organs
Endoderm - ✔✔forms the respiratory system, liver, pancreas, and
digestive system
Summary of Preembryonic Development - ✔✔*Fertilization takes place
in ampulla of the fallopian tube
*Union of sperm and ovum forms a zygote (46 chromosome)
*Cleavage cell division continues to form a morula (mass of 16 cells)
*The inner cell mass is called a blastocyst, which forms the embryo and amnion
*The outer cell mass is called a trophoblast, which forms the placenta and chorion
*Implantation occurs 7 to 10 days after conception in the endometrium
chorion - ✔✔consists of trophoblast cells and a mesodermal lining
Women's Health Nursing, 3rd Edition
Chapter 10 Fetal Development and Genetics
Study Guide with 100% Correct Answers |
Latest Update 2024 | Rated A+
teratogen - ✔✔is any substance, organism, physical agent, or deficiency state
present during gestation that is capable of inducing abnormal postnatal structure or
function by interfering with normal embryonic and fetal development
trisomies - ✔✔there is three of a particular chromosome instead of the usual
two (an entire single chromosome is added)
trophoblast - ✔✔the outer layer of cells surrounding the blastocyst cavity
,umbilical cord - ✔✔
zona pellucida - ✔✔clear protein layer that blocks other sperm from
entering ovum
zygote - ✔✔begins the process of new life
Average human pregnancy lasts for about - ✔✔280 days or 40 weeks from
the date of the last menstrual period
The three stages of fetal development during pregnancy are the: -
✔✔1.Preembryonic stage
2.Embryonic stage
3.Fetal stage
Preembryonic stage - ✔✔*fertilization through the second week
,Embryonic stage - ✔✔*end of the second week through the eighth week
Fetal stage - ✔✔*end of the eight week until birth
Fertilization - ✔✔*typically occurs around 2 weeks after the last
normal menstrual period in a 28-day cycle
*requires a timely interaction between the release of the mature ovum at
ovulation and the ejaculation of enough healthy, mobile sperm to survive the
hostile vaginal environment through which they must travel to meet the ovum
The three embryonic layers of cells formed are: - ✔✔*Ectoderm
*Mesoderm
*Endoderm
Ectoderm - ✔✔forms the central nervous system, special senses, skin, and glands
, Mesoderm - ✔✔forms the skeletal, urinary, circulatory, and reproductive organs
Endoderm - ✔✔forms the respiratory system, liver, pancreas, and
digestive system
Summary of Preembryonic Development - ✔✔*Fertilization takes place
in ampulla of the fallopian tube
*Union of sperm and ovum forms a zygote (46 chromosome)
*Cleavage cell division continues to form a morula (mass of 16 cells)
*The inner cell mass is called a blastocyst, which forms the embryo and amnion
*The outer cell mass is called a trophoblast, which forms the placenta and chorion
*Implantation occurs 7 to 10 days after conception in the endometrium
chorion - ✔✔consists of trophoblast cells and a mesodermal lining
