Term
What Happens in the last 30 weeks of Prenatal development?
what is the period called? |
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Definition
organ systems grow and mature
fetal period |
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Term
| How is an unborn clinical age calculated? |
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Definition
| It is calculated by Mother Last menstrual period. |
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Term
| What describes the timing of developmental events? |
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Definition
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Term
| Compared to the clinical age how do you determine the post-ovulatory age ? |
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Definition
| it is 14 days less than that of the clinical age because fertilization occurs near the time of ovulation. |
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Term
What happens in the 2nd to end of 8th week?
and what is it called? |
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Definition
Major Organs (Develop) come to existence.
Embryonic period |
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Term
| What happen in the first 2 weeks of Prenatal development? |
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Definition
| The Primitive Layer is Formed |
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Term
| What happens 18-36 hours after fertilization? |
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Definition
| Zygote divides to form 2 cells. |
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Term
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Definition
| form 4, 8, 16 ... and so on |
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Term
| What does Pluripotent mean? |
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Definition
| Any cell has the ability to develop into a wide range of tissues |
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|
Term
|
Definition
It is a sphere composed of numerous, smaller spheres.
Solid ball of 12 or more cells. |
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Term
| After 4-5 days after ovulation how many cells does Morula have? |
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Definition
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Term
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Definition
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Term
Around when does the blastocyst attach itself to the uterine wall?
And what process results as a result of this? |
|
Definition
A) 7 days after Fertilization
B) The implantation process |
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|
Term
| What is the Process of Implantation? |
|
Definition
| Burrowing of blastocysts into the uterine wall |
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|
Term
When does the Amniotic Cavity develop?
Where does the Amniotic Cavity Develop? |
|
Definition
After implantation
Inside the inner cell mass |
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Term
| The Amniotic Cavity forming causes what to separate? |
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Definition
| causes inner cell mass nearest to the blastocele to separate into flat disk of tissue called Embryonic disk? |
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|
Term
| What is the Embryonic Disk composed of? |
|
Definition
Ectoderm (outer layer)
&
Endoderm (inner layer) |
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Term
| When do Arms and Legs appear ? |
|
Definition
|
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Term
| Explain Apical Ectodermal Development? |
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Definition
is a specialized thickening of the ectoderm
Stimulates outgrowth
and it develops on the lateral margin of each limb
as the limbs grow limb tissue is layed down proximal to distal ie. arm is developed before the forearm |
|
|
Term
| how does the face develop? |
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Definition
| Through a fusion of 5 embryonic structure |
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Term
| Name the 3 processes of face development? |
|
Definition
Frontonasal Processes
Maxillary Processes
Mandibular Processes |
|
|
Term
| What does the frontonasal processes develop? |
|
Definition
Forehead
Nose
Lip
Midportion of the upper jaw
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|
Term
| What does the 2 maxillary process form? |
|
Definition
Lateral parts of the upper jaw
and Lip |
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|
Term
| What does the 2 mandibular processes form? |
|
Definition
|
|
Term
| What do Nasal Placodes develop into? |
|
Definition
nose, and the center of the upper lip through developing at teh lateral margins of the frontonasal process
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Term
| Failure of the frontonasal and one or both of the maxillary sinuses to fuse |
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Definition
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Term
What is the epidermis derived from
? |
|
Definition
|
|
Term
| Where is the dermis derived from? |
|
Definition
|
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Term
| What is mesoderm known as? |
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Definition
|
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Term
| Where do nails hair and glands develop from? |
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Definition
|
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Term
| What is derived from Neural Crest Cells? |
|
Definition
Melanocytes
&
sensory receptors |
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|
Term
| What is structure is developed from the mesoderm? |
|
Definition
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Term
| Through what type of bone formation does the skeleton develop from? |
|
Definition
Through intramembranous
or endochondral bone formation |
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Term
| From what do the bones of the face develop? |
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Definition
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|
Term
| The skull is formed by what? |
|
Definition
|
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Term
|
Definition
| early embryonic cells that develop into skeletal muscle fibers |
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Term
| where do myoblast migrate from? |
|
Definition
| from somites in mesoderm to future site of muscle development |
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|
Term
| Where is the nervous system derived from ? |
|
Definition
| from neural tube and crest cells |
|
|
Term
| when does neural tube closure begin and end? |
|
Definition
| begins at 21 days of development and it ends at 25 days |
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|
Term
| how does the heart develop? |
|
Definition
2 endothelial tubes which fuse into a single, midline, heart tube.
& from blood vessels from blood islands( small masses of mesoderm) on the surface of the yolk sac and inside the embryo blood islands expand to fuse the circulatory system. |
|
|
Term
| how do the lungs begin to develop? |
|
Definition
as a single midline evagination from forgut in the region of future esophagus
& endoderm |
|
|
Term
| Where do the kidneys develop from? |
|
Definition
| from mesoderm located between somites and lateral part of embryo |
|
|
Term
| how do male and female gonads appear as? |
|
Definition
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|
Term
| What are primordial germ cells destined to become? |
|
Definition
| oocytes or sperm cells on the surface of the yolk sac |
|
|
Term
| when does the embryo become a fetus? |
|
Definition
|
|
Term
| Explain the fetal period? |
|
Definition
fetal period is from day 60 to birth is a very rapid growth
pg 1101 - 1102 |
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|
Term
| Fine soft hair is called what? |
|
Definition
|
|
Term
|
Definition
| a waxy coat of sloughed epithelial cells which protect fetus from the somewhat toxic nature of amniotic fluid formed by the accumulation of of waste in fetus |
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|
Term
| what is the average length of a period? |
|
Definition
|
|
Term
| process by which a baby is born? |
|
Definition
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|
Term
| what overcomes the inhibitory influence of progesterone ? |
|
Definition
|
|
Term
| In mother what is hormone is released? |
|
Definition
|
|
Term
| in fetus what is enlarged prior to birth? |
|
Definition
|
|
Term
| what is the first stage of labor? |
|
Definition
| Onset of regular uterine contraction until cervix dilates to fetal head diameter |
|
|
Term
| what is the second stage of labor? |
|
Definition
| it is from maximum cervical dilation until baby exits vagina |
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|
Term
| What is the third stage of labor ? |
|
Definition
| expulsion of placenta from uterus |
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|
Term
| (anal discharge)is a mixture of cells from digestive tract, amniotic fluid, bile, and mucus excreted by new born. |
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Definition
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|
Term
| in the digestive system what begins to secrete acid? |
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Definition
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|
Term
| the liver does not form adult ___________ till 1st to 2 weeks |
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Definition
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|
Term
| what can be digested by baby but other food must be gradually introduced? |
|
Definition
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Term
| what are the 5 assessments done on a new born? |
|
Definition
Appearance
pulse
grimance
activity
Respiratory effort |
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|
Term
| on what scale is apgar score rated at? |
|
Definition
| 0-2, 2 being normal function |
|
|
Term
| How do you get the total apgar score? |
|
Definition
| sum of all the characteristics |
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Term
| about what percent of body weight does the neonate usually loose during the first few days of life? |
|
Definition
|
|
Term
| what are the changes during birth for the respiratory and circulatory system ? |
|
Definition
1. Foramen ovale closes
2. separates heart in to 2 pumps (2 atria)
3. ductus arteriosus closes and blood no longer flows between pulmonary trunk and aorta
4. Umbilical vein & arteries degenerate |
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Term
| Placenta develops from what? |
|
Definition
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Term
|
Definition
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Term
| Body cavity development ? |
|
Definition
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|
Term
|
Definition
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|
Term
| when the digestive tract is being formed what gets pinched off and how does it remain in tact? |
|
Definition
the yolk sac gets pinched off
but remains attached through the yolk stalk |
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Term
|
Definition
|
|
Term
| what doe the cloacal membrane open to ? |
|
Definition
| opens to form urethra and anus |
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