Class Notes (783,538)
Canada (480,727)
Lecture

Lecture 22 - Evolution of Reptiles
Lecture 22 - Evolution of Reptiles

2 Pages
113 Views
Unlock Document

School
Western University
Department
Earth Sciences
Course
Earth Sciences 1083F/G
Professor
Cameron Tsujita
Semester
Fall

Description
Lecture 22Evolution of ReptilesMajor Innovations in ReptilesDevelopment of amniote eggChange in body coveringChange in skull structureChange in postcranial skeletal structure sprawling to uprightAmniote EggProvides a greater range of lifestyles than those of fish and amphibiansEgg shellMaintains space for the embryoProtects contents of the egg from outside conditionsPermeable to gasesAmnionFluidfilled sac in which the embryo floatsMimics the conditions that the embryo would require if the egg lacked a shell aquatic conditionsAllantois2 important functions1Deliver oxygen to the embryo2Store excretory productsYolkServes as the embryos principal food supplyAlbumenServes as the embryos water supp
More Less

Related notes for Earth Sciences 1083F/G

Log In


OR

Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.

Submit