LS_L03_Animal Body Plans_II_2011

LS_L03_Animal Body Plans_II_2011 - Phylum Annelida LIVING...

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

View Full Document Right Arrow Icon
1 LIVING SYSTEMS Dr Elizabeth May Animal Body Plans II. Dr Elizabeth May Animal Body Plans II. Dr Elizabeth May 2 Phylum Annelida • Three body layers • Coelomate • Segmented - septa separate coelomic compartments • Closed circulatory system • Through gut (mouth and anus) Animal Body Plans II. Dr Elizabeth May 3 Coelomate and segmented Coelom • Used as hydrostatic skeleton • Allows movement/expansion of gut • Circulation • Storage of gametes and embryos Segmentation • Allows localised expansion and contraction of body for locomotion in annelids Annelida Animal Body Plans II. Dr Elizabeth May 4 Earthworms and leeches • Clitellum - thickened body region that secretes a cocoon for eggs • Coelom and internal segmentation reduced in leeches Annelida • Marine bristleworms • Each segment bears parapodia with chaetae (bristles) • Predators with jaws; filter feeders; deposit feeders • Gas exchange by gills Polychaetes
Background image of page 1

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

View Full DocumentRight Arrow Icon
Animal Body Plans II. Dr Elizabeth May 5 Arthropods arthro - jointed; pod - leg • Exoskeleton that is moulted to allow growth • Open circulatory system • Coelom reduced • Segmented body - segments grouped in tagma (e.g. head of insect comprises six segments) • Hexapoda • Myriapoda • Chelicerata • Crustacea
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 10/17/2011 for the course PSYC 2012 taught by Professor ? during the Three '11 term at University of Sydney.

Page1 / 5

LS_L03_Animal Body Plans_II_2011 - Phylum Annelida LIVING...

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