Summary
Summary Reptilia
- Institution
- University Of South Africa (Unisa)
A summary of the chapter, perfect for preparing for exams
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
1 review
By: nitacarstens26 • 4 year ago
Content preview
REPTILIA:Adaptations of Amniotes:
Amniotic egg:
All amniotes have eggs with 4 extraembryonic membranes: the amnion, allantois, chorion and yolk sac
Amnion encloses the embryo in fluid, cushioning the embryo and providing an aqueous medium for growth
Metabolic wastes are stored in a sac formed by the allantois
The chorion surrounds the entire contents of the egg and is highly vascularised
The chorion and allantois form a
respiratory organ
Amniotic eggs are surrounded by a
mineralised flexible shell which
forms a mechanical support and
semipermeable barrier to allow
passage of gases while limiting
water loss
Yolk sac for nutrient storage
Thicker and more waterproof skin:
Thicker, keratinized skin that is less permeable to water
Keratin gives the skin protection and limits water loss
The epidermis contains a hard form of keratin called beta keratin
Rib ventilation of the lungs:
Amniote lungs are better developed than amphibians due to larger surface area
Draw air into lungs by expanding thoracic cavity using costal muscles or pulling
diaphragm or liver posterior
Stronger jaws:
Expansion of jaw musculature provided better mechanical advantage when seizing large prey
Their tongue is muscular and mobile
The benefits of buying summaries with Stuvia:
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
You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.
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 this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller daniellakleymandaniella. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R50,00. 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 summaries for 14 years now