mainly based on external features of cockroach

1. EXTERNAL MORPHOLOGY OF COCKROACH
Guided By:
Chethana R
Yuvaraja’s college
Presented By:
Inchara R
Molecular Biology
07/11/17

2. CONTENTS• Introduction
• Classification of cockroach
• External features
Head
Thorax
Abdomen
• Conclusion
• References
• Acknowledgement

4. CLASSIFICATION OF COCKROACH
PHYLUM Arthropoda
CLASS Insecta
ORDER Blattodae
GENUS Periplaneta
SPECIES Americana

5. • Shape and size: Body is narrow, elongated, bilaterally
symmetrical and dorso-ventrally flattened. The adult measures
3-4cm in length and 2cm in width.
• Colouration: The colour is shining reddish-brown.
• Exoskeleton: The whole body is externally covered by brown-
coloured, hard, jointed, chitinous and greasy cuticle.
- Exoskeleton has hardened plates called sclerites.
External Features

6. • Cuticle: This affords protection from loss of
water, provides rigidity and offers points of
attachment to body muscles.
• Segmentation: Its body is divided into head,
thorax and abdomen.
Fig 1.

7. Fig :2 A-Male in dorsal view. B-female in ventral view

8. HEAD
Fig 3: (a)Head region (b)Mouth parts

9. THORAX
Fig 4: Thorax region of cockroach Fig 5: Leg part

10. ABDOMEN
Fig 6: Abdomen region of both Male and Female.

11. Fig 7: Abdomen Of Female And Male

13. REFERENCES
• E. L. Jordan and P. S. Verma. Invertebrate zoology, S. Chand and
Company Ltd., 1127pp.
• www.biology4isc.weebly.com/morphology-and-antomy-of-
cockroach.

14. ACKNOWLEDGEMENT
I would like to thank the Dept. of Molecular Biology for
providing this opportunity to present this seminar.
I would also like to thank my guide Chethana ma’am for her
valuable guidance.
Thank you one and all.