Chapter 25.2, Problem 6MI

Summary Introduction

To analyze:

The movement of roundworms.

Introduction:

Roundworms are parasites that lives in or on another animal so as to endure. They have long round bodies and reach in size. Roundworms can live in or on people, and can cause numerous issues.

Explanation of Solution

Nematodes move by constriction of the longitudinal muscles. Since their interior weight is high, this makes the body flex instead of smooth, and the animal moves by whipping to and fro. No cilia or flagellae are available.

Roundworm Movement
Thrashing movement	They have muscles that run the length of their bodies. As one muscle contracts, another relaxes, causing a thrashing movement.
Role of pseudocoelom	It acts as a hydrostatic skeleton. The fluid within the pseudocoelom provides rigid support for the muscles to work against.