oviduct
water
cocoon
ootheca
Nereis
Hirudinaria
Heteroneresis
Pheretima
kidneys
solenocytes
nephridia
green glands
continuous throughout
continuous throughout except in first 26 segments
continuous only in first four segments
divided into a number of compartments throughout
setae
circular muscles
coelomic fluid
longitudinal muscles
10th and 11th segments
11th and 12th segments
14th and 15th segments
none of these
pharyngeal
integumentary
both (a) and (b)
none of these
7th, 8 th, 9th and 10th
8th, 10th, 12th and 15th
8th, 9th, 12th and 13th
7th, 9th, 12th and 13th
oligochaeta
polychaeta
hirudinea
archainnelida
from the posterior to the anterior end
from the anterior end to the posterior end
from dorsal vessel to ventral vessel
alternately in both directions (a) and (b)
pharynx
stomach
typholsole
gizzard
intestine
blood
coelom
gizzard
each intersegmental septum
septal excretory canal
lumen of the intestine
supra-intestinal excretory ducts
ovary
chloragogen cell
testes
ganglia
they do not need them
they are burrowing in habit
there is no sufficient space for such organs
the surface acts as an absorptive area which is larger than the volume
dorsal pores
coelomic pores
nephridial pores
anus
prostomium
peristomium
stomium
protostomium
to kill bacteria
to increase absorptive surface
to produce digestive enzymes
to control blood flow
40% urea and 40% uric acid
50% urea and 40% ammonia
40% ammonia and 20% amino acids
60% ammonia and 20% amino acids
fifth to twenty-sixth segment
first to twenty-sixth segment
fifteenth to twenty-sixth segment
immediately after clitellar region to twenty sixth segment
Pharyngeal region
Clitellar region
Intestinal region
Typhlosolar region
liver of invertebrates
liver of vertebrates
kidney of vertebrates
uriniferous tubules of vertebrates
metameric segmentation
true coelom
closed circulatory system
all of these
12,13 and 14 segments
13,14 and 15 segments
14,15 and 16 segments
16,17 and 1&segments
distributive in 1-13 segments
collective in 1-13
completely distributive
completely collective
helps in fixing atmospheric nitrogen
helps in making the land porous
kills harmful bacteria of the soil
helps in making the land fertile by turning it upside down
17
18
19 and 22
17 and 19
secretion of slime
excretion
absorption of digested food
crushing the food
integumentary nephridia
septal nephridia
pharyngeal nephridia
none of these
oviduct
spermatheca
cocoon
clitellum