Lesson 6 Part 3 Flashcards
Stem cells - 1st 4 days of life
Totipotent stem cells
These stem cells have the potential to form a complete human being
Totipotent stem cells
Next 4 days, cells begins to differentiate and slate to become specific body cells
Pluripotent stem cells
Highly specific cells
Multipotent cells
2 separate cavities appear in the inner structure of germ layers
Amniotic cavity
Yolk saks
Supply nourishment only until implantation
Yolk sacs
It serves as source of RBCS
Yolk sac
Between the amniotic cavity and yolk sac, 3rd layer of primary cells
Mesoderm
The 3 germ layers meet at a point called
Embryonic shield
Fetus continually swallow this
Amniotic fluid
The normal volume of AF
800-1200 ml
If fetus is unable to swallow the af, what are the common reasons
Esophageal atresia
Anencephaly
Excessive AF
Hydramnios / polyhydramnios
Reduction in the amount of AF
Oligohydramnios
A disturbance in the kidney function
Oligohydramnios
Which the fetus floats, is composed primarily of water
Amniotic fluid
Protective cheesy-like substance that covers the fetal skin
Vernix caseosa
Soft hair covering the fetus
Lanugo
Normal ph of AF
7.2
The body organ system develop from specific tissue layers
Germ layers
The three separate layers of the cells of primary germ layers
Ectoderm
Endoderm
Mesoderm
Organ formation
Organogenesis
What are the fetal membranes
Amnion
Chorion
A large one line with ectoderm
Amniotic cavity
Small cavity, lined with entoderm
Yolk sac
