'Dorsal nerve cord' presentation slideshows

Chapter 34 Phylum Hemichordata- Acorn Worms

Chapter 34 Phylum Hemichordata- Acorn Worms. Have three body regions: proboscis, collar, and trunk Have both a ventral and dorsal nerve cord anterior portion of dorsal is hollow Have pharyngeal gill slits Have ciliated larvae identical to echinoderms Have a hydrostatic skeleton

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Taxonomy

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The Evolution of Chordates

The Evolution of Chordates. Phylum Chordata belongs to clade Deuterostomata. Deuterostomes have events of development in common with one another. 1. Coelom from archenteron surrounded by mesodermal tissue.

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The Deuterostomes

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Chapter 30

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Chapter 29: Echinoderms and Invertebrate Chordates

Chapter 29: Echinoderms and Invertebrate Chordates. Section 1: Echinoderms. Echinoderms. Includes starfish, sea urchins, sand dollars, etc. Belong to the phylum Echinodermata Stretches back to the beginning of the Cambrian Period, more than 580 million years ago. What Is an Echinoderm?.

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The nervous system controls many activities , including muscle movement

The nervous system controls many activities , including muscle movement. http://nuwsc.co.uk/galleries/top20/pages/Wakeboarding2%20007_jpg.htm. The endocrine system regulates hormone production & secretion.

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Chapters: 3

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Origin of the Vertebrates

Origin of the Vertebrates. Early recognition that this forms a related grouping, based on certain characteristics in common: internal skeleton, circulation direction, some segmentation, etc.

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PHYLUM CHORDATA

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Invertebrate Chordates

Invertebrate Chordates. Hemichordata Urochordata Cephalochordata. Hemichordates. Deuterostomes Gill slits Dorsal nerve cord. Classes of Hemichordates. Enteropneusta Acorn worms Shallow marine animals Pterobranchia Rhabdopleura Colonial, send out feeding zooids. Acorn Worm.

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Hemichordata, Chordata

Hemichordata, Chordata. All answers will be revealed when you click, so answer all questions first. Phylum?. Phylum Hemichordata. Fill in the blanks. Phylum Chordata Subphylum Urochordata Subphylum Cephalochordata Subphylum Vertebrata Class Agnatha Class Chondrichthyes

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