Week 4, Lecture 2, Embryology

Week 4, Lecture 2, Embryology - Embryology Zygote Morula...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Embryology Zygote Morula Blastula Gastrula Larva Embryo (Pupa) Young Adult Fig. 39.10 Early development Morula – solid ball of cells Blastula – hollow ball of cells – undifferentiated – blastocoel Gastrula – cell movement – infolding at one point – blastopore –archenteron – endoderm, ectoderm – fate of the blastopore See Fig. 39.10 Germ layers None –Por i fera (sponges) – aggregation of cells – limited specialization (choanocytes) Fig 26.8 Germ layers Diploblastic – two germ layers (endoderm, ectoderm) Cnidaria – hydra, jellyfish (polyp/medusa) – epidermis, gastrodermis – gastrovascular cavity Fig 26.9 Germ layers Triploblastic – three germ layers – inward wandering of blastopore cells – proliferate and fill blastocoel – becomes mesoderm – in all other animals Fig. 39.10 Body Cavities Acoelomate – solid body, no cavity – organs embedded in tissue – limited movement
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Body Cavities Pseudocoelomates
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/18/2010 for the course BIOLOGY 1223 taught by Professor Gardiner/lajoie during the Fall '09 term at UWO.

Page1 / 4

Week 4, Lecture 2, Embryology - Embryology Zygote Morula...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online