User:Z3252083: Difference between revisions

From Embryology
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[[File:Oct4 staining on USSC-derived spheres.jpg|thumb|Oct4 staining on USSC-derived spheres,<ref><pubmed>20003538</pubmed></ref>]]
[[File:Oct4 staining on USSC-derived spheres.jpg|thumb|Oct4 staining on USSC-derived spheres,<ref><pubmed>20003538</pubmed></ref>]]


===Lab four Questions===
===Lab Four Questions===
 


1.  Name the vessels that drain into the sinus venosus?
1.  Name the vessels that drain into the sinus venosus?


The vitelline vein, umbilical vein and the cardinal vein drain  
The vitelline vein, umbilical vein and the cardinal vein drain  


2. What is the fate of the vitelline artery and vitelline vein?
2. What is the fate of the vitelline artery and vitelline vein?


The vitallene arteries contribute to the GI tract arteries; and the vitallene veins contribute to the adult portal system.
The vitallene arteries contribute to the GI tract arteries; and the vitallene veins contribute to the adult portal system.


3. Name the 4 layers that constitute the placental barrier?
3. Name the 4 layers that constitute the placental barrier?
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'''fetal capillary endothelium'''
'''fetal capillary endothelium'''


4. What stem cells are found in abundance, and may be harvested from the placenta for therapeutic uses?
4. What stem cells are found in abundance, and may be harvested from the placenta for therapeutic uses?


Haematopoetic stem cells
Haematopoetic stem cells

Revision as of 01:31, 16 September 2010

Laboratory

Attendance

--Mary Nicolas 23:38, 28 July 2010 (UTC)

--Mary Nicolas 23:37, 4 August 2010 (UTC)

--Mary Nicolas 23:52, 11 August 2010 (UTC)

--Mary Nicolas 23:39, 18 August 2010 (UTC)

--Mary Nicolas 23:31, 1 September 2010 (UTC)

--z3252083 23:52, 1 September 2010 (UTC)

Lab One Questions

Cell Division lecture

Fertization- First diploid cell

SMH

Picture

Early zygote.jpg







Lab Two Questions

1. Syncytiotropoblast cells secrete:

• Progesterone which maintains the integrity of the uterine lining.

• Human chorionic gonadotropin (hCG) which prevents the degeneration of the corpus luteum.

• Human placental lactogen (HPL) which modifies the metabolic state of the mother during pregnancy to facilitate the energy supply of the fetus

2. The corpus luteum secretes progesterone (signalled by hCG secreted by the trophoblast cells of the blastocyst) which consequently maintains the endometrium which provides an area rich in blood cells so that the zygote can develop.

Lab Three Questions

1. What Carnegie stages occur during week 3 and week 4?

Week 3: stages 7, 8 & 9

Week 4: stages 10, 11 & 12


2. What is the change in overall embryo size form the beginning of week 3 to the end of week 4?

2.6mm - 4.6mm (from 0.4mm in week 3 to 3-5mm in week 4)


3. Approximately when do the cranial (anterior) and caudal (posterior) neuropores close in the human embryo?

Cranial- stage 11 (days 23-26)

Caudal - stage 12 (days 26-30)


Oct4 staining on USSC-derived spheres,[1]

Lab Four Questions

1. Name the vessels that drain into the sinus venosus?

The vitelline vein, umbilical vein and the cardinal vein drain


2. What is the fate of the vitelline artery and vitelline vein?

The vitallene arteries contribute to the GI tract arteries; and the vitallene veins contribute to the adult portal system.


3. Name the 4 layers that constitute the placental barrier?

syncitiotrophoblast

cytotrophoblast

villi connective tissues

fetal capillary endothelium


4. What stem cells are found in abundance, and may be harvested from the placenta for therapeutic uses?

Haematopoetic stem cells

  1. <pubmed>20003538</pubmed>