Question

Q.1
Discuss the external structure of Hirudinarea with labeled diagram.

Answer 1

Answer:

MORPHOLOGY OF LEECH:

i) Shape and size: Hirudinaria is soft, vermiform, elongated and dorsi ventrally flattened worm. It is 10 to 15 cm long. The body is broad near the posterior and while narrow near the anterior end. The dorsal surface is somewhat convex and the ventral surface is more or less flat.

Answer 2

Structure of Hirudinarea

Explanation:

• The group Hirudinea includes five hundred varieties of leeches.

• Most leeches are pure water. Some are aquatic.

• Few are entirely terrestrial. Leeches prey on tiny insects or they serve on the body liquids of vertebrates.

• Absence of Parapodia and head appendages in leeches.
• Setae are lacking in many of the leeches. Setae happen in anterior parts in a few leeches.
• Leeches are dorsoventrally anteriorly. They hold 34 sections. The section is divided by annuls.
• Hence, it is hard to discover section externally. Anterior to and succeeding sections are transformed into mouth.
• The leeches have altered trims of body-wall tissues and coelom. It affects the movement of a leech.

To learn more:

Leeches not have an elaborate secretions of digestive juice and ...

https://brainly.in/question/10235534

discuss the external structure of hirudinarea with labeled diagram ...

https://brainly.in/question/15678546