Slides

Ascaris lumbricoides

Female/Image Mag: 4x

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Male/Image Mag: 4x

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Trichinella Spiralis

Encysted in muscle/ Image Mag: 4x

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Necator americanus

Live Specimens

Phylum: Rotifera

Rotifers

Rotifera Identification

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Phylum: Nematoda

Vinegar eels

 

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Ascaris Dissection:

Female

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Male

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Ascaris Life Cycle

  1. Infected eggs are swallowed
  2. Eggs reach small intestine and hatch
  3. L3 larvae migrate to hepatic portal through intestinal wall
  4. Larvae enter lungs and alveolar spaces causing cough
  5. Coughed-up larvae are swallowed
  6. Larvae reach small intestine for a second time, mature and adult worms lay eggs

Nematode Circulatory System

No Circulatory System

Nematode Nervous System

Developed nerve ring consisting of four ganglia. There are twelve nerves, six in which run through the body to the reproductive organs and gut, and six that run through the body to the mouth.

 

Open Circulatory System– blood is pumped into a hemocoel and then it diffuses back to the circulatory system. The heart pumps blood through the body and tissues

Complete Digestive Tract– System with two openings containing a mouth, gut and anus

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