Презентация на тему: Types of nervous system

Types of nervous system
Jellyfish and hydra
Annelids(earthworm) and Arthropods
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Первый слайд презентации: Types of nervous system

Aim of lesson: Compare the types of nervous system of animals

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Слайд 2: Jellyfish and hydra

They have very simple nervous system. They don’t have brain or spinal cord. Just nervous cells.

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Слайд 3: Flatworms

Their nervous system is ladder like. At the head region, there are two simple brain like structures, which are called ganglia.

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Слайд 4: Annelids(earthworm) and Arthropods

They have segmented bodies, each segment has ganglion. Every ganglion controls own segment. Ventral (lower) nerve cord connects all of ganglia to each other. A simple brain connects sensory organs of head.

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Последний слайд презентации: Types of nervous system: Vertebrates

All vertebrates have a central nervous system made of brain and spinal cord, and peripheral nervous system made of ganglia and nerves.

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