Chapter 25.1, Problem 3MI

Summary Introduction

To define:

The given terms:

Introduction:

The given terms are related to flatworms. Flatworms are thin, flat, acoelomate, free-living or parasitic animals. They have limited number of organs and systems and are the first animals that exhibit bilateral symmetry.

Explanation of Solution

Pharynx: It is a tubelike, muscular organ that extends from the mouth in Planaria and other organisms. It helps in feeding and digestion.

Falme cells: They are bubble-like cells lined with cilia present in in flatworms. They are excretory cells that help move water and excretory substances out of the body.

Ganglion: it is a clusters of nerve cells from which nerve cords extend the length of the body.

Regeneration: It is the natural process of replacing lost or missing cells, tissues, organs, and even entire body parts in some animals.

Scolex:  The knob-like anterior end of a tapeworm, having suckers or hook-like parts that in the tapeworm which serve as organs of attachment to the host.

Proglottid: it is a section of a tapeworm that contains muscles, nerves, flame cells and male and female reproductive organs.