Phylum: Nematoda

1. Phylum: Nematoda

2. Phylum: Nematoda

• They are round worms
• Triploblastic animals
• Have complete digestive
system with openings
at both ends
• Pseudocoleomate
Ex1:Anclystoma sp.

3.

C
D

4.

5.

Ascaris sp.
• Pale white- body
• Lives as a parasite on mammals intestine

6.

Female
Lateral line (lateral side)
Posterior (broad)
Anterior (pointed)
Dorsal side (dissection
will be along this side)

7. Male Reproductive System

gut
testis
Vas deference
Two lateral lines
vesicula seminalis

8. Female reproductive system

lateral line
oviduct
spermatheca
Anterior ovary

9.

10.

11. T.S. Male ascaris

Dorsal nerve cord
Intestine
Epidermis
Lateral line
Testes
Vas deference
Pseudocoelom
Ventral nerve cord

12.

oviduct

13. T.S. female ascaris

Cutical
Dorsal line
Epidermis
Dorsal nerve cord
Intestine
Ovaries
Lateral
line
Oviduct
Uterus
Excretory
canal
Pseudocoelom
Ventral line
Genital
Genital
epithelium
epithelium
Central rachis
Ventral nerve cord

14.

cuticle
Dorsal line
Cytoplasmic
part
epidermis
Contractile
part
Longitudinal muscle fibre

15. Enlarged part of body wall

epidermis
Dorsal line
cuticle
Contractile
part
Syncytium
nucleus
Cytoplasmic
part (non
contractile)
Longitudinal
muscle fiber
Cytoplasmic
process
Dorsal nerve cord