+
Related Flashcards
Related Topics
Cards In This Set
| Front | Back |
|
The study of a single gene or gene sequence and
their effects on living organisms (we’re are concerned with humans)
|
Genetics
|
|
The study of the entire DNA structure of all of
an organism’s genes
|
Genomics
|
|
Occurs in the philliopian tube; may cause spotting in some women
|
Fertilization
|
|
When does implantation occur? where does it usually occur?
|
6-10 days after fertilization; in the upper posterior wall of the uterus
|
|
Solid ball of 16 cells is formed by day 3 which forms into two distinct areas: the blastocyst and the trophoblast
|
Morula
|
|
In the morulla whats cells make up the blastocyst and what does the blastocyst cells become?
|
The inner cells; become the fetus
|
|
In the morulla whats cells make up the trophoblast and what do the trophoblastic cells become?
|
The outer cells; becomes the placenta
|
|
What are the primary germ layers of the embryo and what do they encompass?
|
Ectoderm: outtermost layer
mesoderm:including skeletal (bone), smooth/cardiac muscle, connective tissues, cardiovascular system, spleen and GU endoderm: includes the epithelial lining of the GI/ Resp systems |
|
What are the two embryo coverings? what are their function?
|
The amnion is drawn around the embryo and umbilical cord; the chorion is the outermost layer surrounding the embryo and is developed from the trophoblast- umbilical cord comes into this layer and this layer contains major umbilical blood vessels
|
|
True or false. Amniotic fluid is produced by the fetus. Explain your answer.
|
false: At first, derives from maternal blood via
diffusionas fetus grows the fluid becomes composed of
·
plasma, cells, hair, and fetal urine
|
|
List the functions of the amniotic fluid
|
o
“shock absorber”; serves as a cushion for forces
o
Allows for stable temperature
o
Waste repository
o
Sources of oral fluid for GI system peristalisis-
DOES NOT provide nourishment
o
Allows for motion and symmetrical G&D
o
Prevents adherence of the amnion to fetus so it
can grow
|
|
Inadequate amount of amniotic fluid (<300 ml) is called _____ and could signal ____ _____ in the fetus.
|
Oligohydramnios/ renal abnormalities
|
|
What is polyhydramnios? and what could this signal in the fetus?
|
Overabundance of amniotic fluid (2000+ ml) - could be a sign of GI disorder in the fetus
|
|
·
Before the placenta fully develops it is
referred to as the _____ _____ and nourishes the growing embryo
|
Yolk sac
|
|
·
tethers the fetus to the placenta
o
Normal length: ______?
o
Normal diameter: 2 cm
What can happen if cord length is too short? too long? |
Umbilical cord; 30-90cm
if too short-problems in Labor and delivery, if too long problems in utero (cord wrapping around neck etc.) |
