The excretory system of annelids consists of nephridia, which are tubular organs that open to the outside. Nephridia eliminate metabolic waste from the body. Earthworms have metanephridia composed of nephrostomes and complex tubules that open to the outside via nephridopores. The coelomic fluid enters the nephrostome and is transformed into urine as it passes through the tubule, with various substances being reabsorbed or eliminated.

1. EXCRETORY SYSTEM IN ANNELIDS

2. EXCRETORY SYSTEM IN ANNELIDS
In annelids
Annelids are round, segmented
worms, like the earthworm. The
excretory organs of the annelids
are nephridia. These are
composed of a tube that opens into
a hole to the outside, called
nefridioporo. Some species have a
pair of nephrids in each segment of
the body and others only one pair

3. PARTS:
 The nephridiums :(from Latin
nephridium) are excretory
organs of invertebrate animals
with a function analogous to that
of the kidneys of vertebrates.
They eliminate metabolic waste
from the body of the animal.
They appear in many animal
edges. Two types are
distinguished, protonephridia
and metanefridios.
EXCRETORY SYSTEM IN
ANNELIDS

4. 
Annelids The organs of excretion in earthworms are
metanefridios. These metanephridios are constituted by
nephrostomas and complex tubules, that before opening
to the outside they form a dilation called bladder. The
nephridporos are located outside, some culminate in the
intestine (enteronephridios). To perform the excretion, the
coelomic fluid of the anterior somite penetrates through
the nephrosome, and as it passes through the tubule, it is
transformed into urine. As the urine is formed along the
tube, the concentrations of the elements that form it vary,
which indicates which substances are reabsorbed and
which are eliminated, as well as the control of the water
according to the needs of the organism. They eliminate
mainly urea
EXCRETORY SYSTEM IN ANNELIDS

5. Excretory system in insects
BY:
-DANILO SANTAMARIA
-JUAN D. HERNANDEZ
-PABLO A. LÒPEZ
TO:
MISS ADRIANA SUAREZ

6. what is excretion?
Is the biological process that collect waste
products from metabolic functions. Is in charge to
remove toxins and wasteds from body and the
amount of fluid and solt in the body.

7. what is osmoregulation?
Is the process that keeps balance of an organism body fluids, this
process is necessary for all living things. The osmoregulation keep
water enough to support life. In most living the excretory system
develop osmoregulation process.

8. EXCRETION in INSECTS
The insects have a special system formed by some tube called malpighi tubes that operate all
together. They operate in conjunction with glands in the wall of the rectum, they form urine that
go to the large intestine and float in the hemocele in where they capture the waste products and
end in the final of the tube where are evacuated and eliminated in the urine.
The urine of insects are uricotelism that means that the insects urine is mostly composed of uric
acid an that happened because they reabsorb water depending on his environment are if it is hot
reabsorb almost all of the water leaving the urine almost dry as opposed to other insects which
live in holders wet and your urine is more liquid

9. Bibliography
www.asturnatura.com
Prezi presentación of: maicol dufour and carlos chumpitasi
Cronodon.com
Scholar.google.com.co
es.Wikipedia.org

11. AMPHIBIANS
Stefania Cepeda
Laura Rodriguez
Paulina Prasca

12. What is excretory system ?
 Is responsible for eliminating toxic substances and waste products from living
things body.
 The excretory system is formed by the urinary system (formed by the kidneys and
the urinary tract), the lungs and the skin.

13. Excretory system in amphibians
 the excretory system of amphibians is formed by kidneys, excretory conductors
and urinary bladder, the kidneys are bean-shaped organs that filter the blood
through the nephrons, the excretory conductors are Anatomical structures
through which the urine circulates in the body, from the kidneys to the outside
and the urinary bladder is the one that stores the urine till you can feel it.

14. WHAT IS OSMOSIS?
 Osmosis is the passive transport of water and ions.
 Pass a solution from a solution of high concentration to a lower concentration

15. Osmosis in Amphibians
Osmosis is a process that is equal in all animals but the difference in amphibians is
that because of their bare skin the pass of water and ions is easier making the
susceptibler to lose all the liquids inside.

16. WHAT IS OSMOREGULATION?
 Process by which cells and simple organisms mantain fluid and electrolyte balance
with their surroundings

17. OSMOREGULATION IN AMPHIBIANS
 They have a wáter intake that moisturizes them and a passive loss of salts with a
greater effect in the aerial área by having a bare skin to compensate them, they
urinate(Kidneys adapted to the great filtration) or present an active uptake of salts
by scattered cells in the skin similar to chloride cells

19. Bibliography
 https://www.google.com.co/search?q=homeostasis++hidrica+en+anfibios&sourc
e
 http://www.dictionary.com/browse/osmoregulation
 https://www.ucm.es/data/cont/docs/489-2018-01-18-Anfibios%201.pdf
 https://www.google.com.co/search?q=homeostasis+termorreguladora+e+hidrica
+en+anfibios&source=lnms&tbm=isch&sa=X&ved

20. EXCRETION in fishes
LAURACAMARGOAND ANA MARÍA

21. OSMOSIS
 Passage of a solvent (such as water) from a lower-concentration solution to a higher-concentration
solution, through a semi-permeable membrane (that allows the solvent to pass but not what is
dissolved in it) separating the two solutions. The flow of solvent stops when both solutions become
equal in concentration. In nature, osmosis is an essential process by means of which nutrients are
delivered to the cells.

22. osmoregulation
 Is the process that keep balance of an organim body fluid, this
process is necesary for all the living things osmoregulation process is
developed by excretory sistems.

23. excretory system of fish
 The primary excretory organ in fishes, as in other vertebrates, is the kidneys. In fishes some
excretion also takes place in the digestive track , skin, and especially the gills most fish release
their nitrogenous wastes as ammonia. Some of the wastes diffuse through the gills into the
surrounding water. Others are removed by the kidneys excretory organs that filter wastes from the
blood. Kidneys help fishes control the amount of ammonia in their bodies. Saltwater fish tend to
lose water because of osmosis. In saltwater fish, the kidneys concentrate wastes and return as
much water as possible back to the body.
 -oesophagus -anus
 -stomach -pyloric ceca
 -primary -gills
 Kidney -mouth
 -intestine
 -rectum