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Attendance

--z3291079 23:44, 28 July 2010 (UTC)

--z3291079 23:04, 4 August 2010 (UTC)

--z3291079 22:58, 11 August 2010 (UTC)

--z3291079 23:05, 18 August 2010 (UTC)

Lab Week 2

Internal Link Cell Division Lecture


External Link SMH


Link for Fertilisation information

Picture

Early zygote.jpg

Lab 2 (Week 3) Questions

1. What factor do the synctiotrophoblast cells secrete to support the ongoing pregnancy?

They secrete Human Chorionic Gonadotropin hormone (hCG).

2. What does the corpus luteum secrete to prevent continuation of the menstrual cycle?

The corpus luteum secretes estrogen and progesterone hormones.

Lab 3 (Week 4) 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?

Ranges from 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)

Lab 4 (Week 5) Questions

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

Vitelline veins, ubilical veins and cardinal veins

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

Contribute to the portal system of the liver in the adult

3. Name the 4 layers that constitute the placental barrier? Syncitiotrophoblast, cytotrophoblast, villi connective tissue and fetal capillary endothelium.

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