Chapter 25, Problem 18A

Summary Introduction

To determine:

A concept map having nematode, pseudocoelomate, digestive tract with two opening parasitic, free-living, lengthwise muscles, and host.

Explanation of Solution

Nematodes are also known as roundworms that constitute the phylum Nematoda. They are pseudocoelomates that means they have pseudocoelom having fluid filled in it. They have a mouth and anus, which form a complete digestive system with two openings. They move in a thrashing manner with the help of lengthwise muscles. They are free-living or parasitic. The parasitic nematodes live in the body of another animal called the host.