Class Notes (838,386)
Canada (510,872)
Biology (2,933)
BIO2135 (167)
Jon Houseman (156)
Lecture

bio2135(2)

5 Pages
80 Views
Unlock Document

Department
Biology
Course
BIO2135
Professor
Jon Houseman
Semester
Winter

Description
Lecture 4PlatyhelminthesJanuary2913234 PM Jan 29h 2013Animal InnovationsTriploblastic formed from the three cell layers endoderm ectoderm and mesodermMesodermal musculature everyone will form cavities with mesodermoCreate well defined muscles movement and sensory structures accumulate in the front leads to bilateral symmetry everything after is bilateraloDirected movement associated with mesoderm Body Plans slide 4Diploblastic Organisms formed from only the two primitive cell layersendoderm and ectoderm matrix called mesoglea or mesenchymePseudocoelomate body cavity that is not completely lined by mesodermAcoelomate platy Triploblastic animals that do not have an internal body cavity only space for gutoGave up body cavity and became solidEucoelomate organisms that possess a true coelom with mesoderm lining the whole body cavity ProsotomiaDeuterostomesProtostomes phyla that share the folowing characteristicsoBlastopore is mouthBlastulation one layer present blastule blastoderm cavity around it is the blastocoelGastrulation blastula is converted into a gastrula blastopore forms to create endoderm second germ layer diploSingle layer pinches in becomes endoderm surrounded by ecctodermForms blastopore opening into gut that becomes mouthospiral cleavage Pattern of cell division in embryo where products shift by rotating clockwise or counterclockwise so daughter cells lie in the furrow of the underlying pair of cell opposite of radialoSchizocoely true body cavity that forms by schizocoelus splitting of the mesodermProliferate between and splitsoAutapomorphies blastopore is mouth paired ventral nerve cord connected to apical brainoTaxa Ecdysozoa molten cuticle Lophotrochozoa lophophores and trocophores Platyzoa acoelomateDeuterostomes phyla containing following characteristicsoBlastopore is anus not forming mouth when blastopore doesnt become mouth 2nd opening doesoRadial cleavage during development as the cells of the zygote divide the products of the cell division remain stacked directly on top of each other
More Less

Related notes for BIO2135

Log In


OR

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