The document discusses various excretory organs found in invertebrates, including contractile vacuoles, protonephridia, metanephridia, coelomoducts, nephromixia, coxal glands, and Malpighian tubules. It highlights their specific structures, functions, and types, emphasizing the role of coelomoducts as gonoducts, and their dual function in some organisms. Additionally, it describes the presence of different nephridia types in earthworms and their respective locations within the body.

1. Excretory organs
in invertebrates
Dr. Shampa Jain
Professor
Department of Zoology & Biotechnology Govt. M.H. College
of Home Science & Science for Women, Autonomous,
Jabalpur, M.P. India

2. Excretory organs in
invertebrates
 Contrectile vacuoles
 Protonephredia
 Metanephredia
 Coelomoduct and Nephromixia
 Coxal glands
 Malpighian tubules
 Organ of Bojanus

3. PROTONEPHRIDIA
 Protonephridia
of Fasciola

4. Solencytes
Solen – A channel, cyte- cell

5. METANEPHRIDIA
In Pheretima three types
of nephridia found their
location in body .
Pharyngeal nephridia
Integumentary nephridia
Septal nephridia

9. TYPES OF
METANEPHRIDIA
Exo and Enteronephridia
Micro and Meganephridia

10. coelomoducts
 Coelomoducts are normally wide tubes of
mesodermal origin.
 Coelomoducts opens to the exterior by a
genital pore and into coelome by a relatively
large ciliated funnel called celomostomes.
 Coelomoducts primarily function as Gonoducts
and are confined to only a few reproductive
segments.
 In some forms coelomoducts may secondarily
function as excretory organ.
 The uriniferous tubules of vertebrate kidney
are coelomoducts.

11. NEPHROMIXIA
Protonephromixium
Metanephromixium
Mixonephridium

12. TYPES OF NEPHROMIXIA

13.  COXAL & ANTENNARY
GLAND OF PRAWN

14. M

15.  POSITION OF MALPIGHIAN
TUBULES

16. A MALPIGHIAN TUBULES
OF COCKROACH

17.  ORGAN OF
BOJANUS