Prenatal Development in Birth Flashcards
It is the period of prenatal development that takes place in the first two weeks after conception. A. Germinal Period B. Embryonic Period C. Fetal Period
A. Germinal Period
It is the period of prenatal development that occurs from two to eight weeks after conception. During this short time, every major organ takes shape, in at least a primitive form, in a process called organogenesis. A. Germinal Period B. Embryonic Period C.Fetal Period
B. Embryonic Period
Lasting about seven months, is the prenatal period between two months after conception and birth in typical pregnancies. At about 23 weeks after conception, midway through the fifth month, the fetus reaches the age of viability, when survival outside the uterus is possible if the brain and respiratory system are well enough developed. A. Germinal Period B. Embryonic Period C.Fetal Period
C.Fetal Period
The process involving the specialization of cells to perform various tasks. A. Differentiation B. Blastocyst C. Trophoblast
A. Differentiation
Consisting of an inner mass of cells that will eventually develop into the embryo. A. Differentiation B. Blastocyst C. Trophoblast
B. Blastocyst
An outer layer of cells that later provides nutrition and support for the embryo. A. Differentiation B. Blastocyst C. Trophoblast
C. Trophoblast
Its the mass of cells. A. Embryo B. Endoderm C. Mesoderm D. Ectoderm
A. Embryo
The inner layer of cells, which will develop into the digestive and respiratory system. A. Embryo B. Endoderm C. Mesoderm D. Ectoderm
B. Endoderm
The middle layer, which will become the circulatory system, bones, muscles, excretory system, and reproductive system. A. Embryo B. Endoderm C. Mesoderm D. Ectoderm
C. Mesoderm
The outermost layer, which will become the nervous system and brain, sensory receptors, and skin parts. A. Embryo B. Endoderm C. Mesoderm D. Ectoderm
D. Ectoderm
Its like a bag, or an envelope contains a clear fluid in which the developing embryo floats. A. Amnion B. Umbilical Cord C. Placentae D. Chorion E. Organogenesis
A. Amnion
It contains two arteries and one vein and connects the baby to the placenta. A. Amnion B. Umbilical Cord C. Placentae D. Chorion E. Organogenesis
B. Umbilical Cord
It consist of a disk-shaped group of tissues in which small blood vessels from the mother and the offspring intertwine but do not join.A. Amnion B. Umbilical Cord C. Placentae D. Chorion E. Organogenesis
C. Placentae
Its a membrane that surrounds the amnion and attaches rootlike extensions called villi to the uterine lining to gather nourishment for the embryo, becomes the lining of the placenta.A. Amnion B. Umbilical Cord C. Placentae D. Chorion E. Organogenesis
D. Chorion
It is the name given to the process of organ formation during the first two months of prenatal development. A. Amnion B. Umbilical Cord C. Placentae D. Chorion E. Organogenesis
E. Organogenesis
The chances of surviving outside the womb is called: A. Viability B. Differentiation C. Stem Cells
A. Viability
Early in development, every neuron starts with the potential to become any specific type of neuron; what it becomes, how it differentiates, or depends on where it migrates is called: A. Viability B. Differentiation C. Stem Cells
B. Differentiation
These are the early cells that have not yet specialized. A. Viability B. Differentiation C. Stem Cells
C. Stem Cells
In Germinal Period, Fertilization usually occurs within 24 hours of ovulation A. Day 1 B. Day 2 C. Day 3-4
A. Day 1
In Germinal Period, The single-celled zygote begins to divided 24-36 hours after fertilization A. Day 1 B. Day 2 C. Day 3-4
B. Day 2
In Germinal Period, The mass has 16 cells and is called a morula; it is traveling down the fallopian tube to the uterus. A. Day 1 B. Day 2 C. Day 3-4
C. Day 3-4
In Germinal Period, An inner cell mass forms; the entire mass is called a blastocyst and is the size of a pinhead. A. Day 5 B. Day 6-7 C. Day 8-14
A. Day 5
In Germinal Period, The blastyocyst attaches to the wall of the uterus. A. Day 5 B. Day 6-7 C. Day 8-14
B. Day 6-7
In Germinal Period The blastocyst becomes fully embedded in the wall of the uterus. It now has about 250 cells. A. Day 5 B. Day 6-7 C. Day 8-14
C. Day 8-14
In Embryonic Period, Now an embryo, the person-to-be is just 1/10 of an inch (2mm) long. It has become elongated, and three laters emerge. The ectoderm, mesoder, and endoderm. A. Week 3 B. Week 4 C. Week 5
A. Week 3
In Embryonic Period, The embryo is so curved that the two ends almost touch. the outer layer (ectoderm) folds into the neural tube. From the mesoderm, a tiny heart forms and begins to beat. The endoderm differentiates into a gastrointestinal tract and lungs. Between days 21 and 28. Eyes develop. A. Week 3 B. Week 4 C. Week 5
B Week 4
In Embryonic Period, Ears, mouth, and throat take shape. Arm and leg buds appear. The handplate from which fingers will emerge appears. The heart divides into two regions. and the brain differentiates into forebrain, midbrain, and hindbrain. A. Week 3 B. Week 4 C. Week 5
C. Week 5
In Embryonic Period, The embryo is almost 1 inch long. The heart divides into four chambers. Fingers emerge from the hand-plate, and primitive facial features are evident. The important process of sexual differentiation begins. A. Week 6-7 B. Week 8 C. Week 9
A. Week 6-7
In Embryonic Period, Most structures and organs are present. Ovaries and testes are evident. The embryo begins to straighten and assumes a more human apperance. A. Week 6-7 B. Week 8 C. Week 9
B. Week 8
In Fetal Period, Bone tissue emereges and the embryo becomes a fetus. The head of the fetus looks huge relative to the rest of the body. It takes up about half of the total length of the fetus. The fetus can open and close its mouth and turn its head. A. Week 6-7 B. Week 8 C. Week 9
C. Week 9
In Fetal Period, Fingers and toes are clearly formed. External genitalia have developed. Movements have increased substantially. Arms and Legs kick vigorously, but the fetus is still too small for the mother to feel all these movements. The fetus also shows “breathing” movements with its chest and some reflexes. A. Week 10-12 B. Week 13-16 C. Week 17-22
A. Week 10-12
In Fetal Period, The heartbeat should be audible with a stethoscope. Fetal movements may become apparent to the mother. The fetus is about 4 1/2 inches long and the skeleton is becoming harder. A. Week 10-12 B. Week 13-16 C. Week 17-22
B. Week 13-16