'Nerve ring' diaporamas de présentation

Chapter 48

Chapter 48. The Nervous System. Command and Control Center The human brain Contains an estimated 100 billion nerve cells, or neurons Each neuron May communicate with thousands of other neurons. Figure 48.1. Functional magnetic resonance imaging 3-D map of brain activity.

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Body Symmetry & Coelomate

Body Symmetry & Coelomate. Symmetrical. Acoelomate no mesoderm. Pseudocoelomate mesoderm attach to one side but no cleavage. Coelomate mesoderm cleavage with coelom inbetween. Segmented Body. Porifera (spongy). Asymmetric body Lack of body organizaiton. Structure.

1.18k views • 77 slides

Phylum Mollusca

Phylum Mollusca. Phylum Mollusca (mollis, soft). Body usually an anterior head, ventral foot and a dorsal visceral mass . Covered by a fleshy outgrowth of the body wall called a mantle . Shell if present is secreted by the mantle

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Phylum Echinodermata

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Chapter 22 - Nematodes: Form, Function, and Classification

Chapter 22 - Nematodes: Form, Function, and Classification. General Characteristics Body elongate, cylindrical, and tapered at both ends Body design is a tube within a tube, the outer tube being the body wall and underlying muscles and the inner tube being the digestive tract

1.2k views • 26 slides

Arthropods

Arthropods. General Characteristics: Jointed appendages Segmented bodies Exoskeleton (made of chitin that must molt to grow) Classified by number of legs and body segments. Examples : Subphylum: chelicerata Class: arachnida 4 pairs of legs

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Phylum Echinodermata

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