100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Summary Lecture 6 -- Human Development -- Making of the embryo $3.20
Add to cart

Summary

Summary Lecture 6 -- Human Development -- Making of the embryo

2 reviews
 64 views  0 purchase
  • Course
  • Institution
  • Book

Summary embryo development. With clear pictures

Preview 1 out of 5  pages

  • No
  • Chapter 1
  • March 19, 2019
  • 5
  • 2018/2019
  • Summary

2  reviews

review-writer-avatar

By: abigailmurray • 2 year ago

review-writer-avatar

By: alisiasoliman • 2 year ago

avatar-seller
Human Development Lecture 6 – The making part 1

Trimesters (period of 3 months);
• First trimester; most dangerous period, all the major organs appear.
o Mitosis, cleavage, hatching, implantation, placentation (teratogens)
o Embryological and early fetal development
• Second trimester; development of organs and shape and proportions change.
The fetus grows faster than the placenta. Amnion and chorion membranes
fuse. Bone formation occurs. Covered with fine hair (lanugo)
• Third trimester; Growth rate slows down, deposition of adipose tissue. Organ
systems become fully functional.

Birth defects;
The embryological period is most sensitive to
substances/toxic components.
Many birth defects can be prevented.

When does life begin?
1. Metabolic view; no point when life begins. Sperm and egg cell are as alive as
any other organism.
2. Genetic view; when there is fertilization.
3. Embryological view; at day 12. Earlier identical twins can form and this are 2
individuals with 2 different lives/personalities.
4. Neurological view; at 27 weeks, because then EEG should be defined
5. Ecological/technological view; at 23 weeks, when embryo can exist separately
from its maternal environment. When lungs are mature
6. The immunological view; around birth, because life begins when organism
recognize the distinction between self and non-self
7. The integrated physiological view; when baby is born
and umbilical cord is cut, because baby has become
independent of mother.

Pre-embryonic period (first 2 weeks); WEEK 1; zygote
to blastocyst, implantation
Cleavage; Zygote become pre-embryo
Sequence of cell divisions immediately after fertilization.
The zygote become pre-embryo which develops into
multicellular blastocyst
Cleavage end when blastocyst contact the uterine wall.

First divisions until morula generate identical cells; blastomeres
Morula is a (groter dan of gelijk aan) 16 cell stage
Blastocyst; hollow ball with inner cavity blastocoele and inner cell mass
(ICM) which will form the embryo. Outer layer is trophoblast, which become
the extraembryonic membrane; play role in implantation and supports
embryo’s growth.
Trophoblast secrete enzymes that erode through zone pellucida, the uterine fluid can
now feed the pre-embryo.

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller biomedicalsciencesvu. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $3.20. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

53068 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$3.20
  • (2)
Add to cart
Added