The excretory system removes waste from the body to maintain homeostasis. It eliminates urine and other liquid and gaseous wastes through organs like the kidneys, ureters, and urinary bladder. The kidneys filter blood to produce urine, while the ureters and bladder store and release it. Other excretory organs include the skin, lungs, large intestine, and liver. Plants lack specialized excretory organs and instead release oxygen, carbon dioxide, water and other wastes passively through leaves, roots, fallen leaves or soil exudates to remove excess materials.

3. The excretory system is a passive biological
system that removes excess, unnecessary
materials from an organism, so as to help
maintain homeostasis within the organism
and prevent damage to the body. It is
responsible for the elimination of the waste
products of metabolism as well as other
liquid and gaseous wastes, as urine and as a
component of sweat and exhalation. As most
healthy functioning organs produce
metabolic and other wastes, the entire
organism depends on the function of the
system; however, only the organs
specifically for the excretion process are
considered a part of the excretory system.

4. 1. Kidneys
The bean-shaped organs found just above the waistline
Renal Fascia
This is the thin fibrous layer, which anchors the kidney to the surrounding structures
to maintain the normal position of the organ.

5. 
The work of the kidney
is to separate urine from
the blood which flows
through it.

Kidney plays a role in
regulating the
composition of the
plasma by extracting
excess wastes and other
substances into the
urine.

Each kidney receives the
renal artery directly
from the dorsal aorta
and are drained by the
renal veins which pass
to the postcaval vein.

6. •Ureters
These are two tubes
which function to
convey urine from the
kidneys to the
bladder.
Passes from the pelvis
to the posterior
aspect of the urinary
bladder
Peristalsis begins at
the renal pelvis and
ending at the bladder.

7. •Urinary Bladder
•This sac lies
posterior to the
pubis.
•Separated from
the rectum by the
seminal vesicles in
the male and by the
vagina and uterus in
the female.
•Serves as reservoir
for urine, gradually
fills and becomes
distended

8. Other Excretory Organ
1. Skin


Excretes
wastes, secretes
fluid and make
possible growth and
repair of hair cells.
Through
sweating, the skin
excretes excess
salt, water and
other metabolic
wastes in the form
of perspiration
through pores
2. Large intestine

12-24 hours are
required for the
waste products of
digestion to pass
through the colon
and rectum.

9. 3. Lungs
 Excreting CO2
4. Liver
 Produces bile
which is
concentrated by
the removal of
water and salts.

11. Plants are not generally considered to possess special
mechanisms of elimination. Photosynthetic activities of
green plants, in the presence of light, produce oxygen,
which diffuses out through openings in the leaves
(stomata) or through the cell walls of roots and other
plant structures
Green plants in darkness or plants that do not contain
chlorophyll produce carbon dioxide and water as respiratory
waste products. Plants can get rid of excess water by
transpiration. Waste products may be stored in leaves that fall
off. Other waste materials that are exuded by some plants —
resins, saps, latexes, etc. These processes do not need added
energy, they act passively. Plants also excrete some waste
substances into the soil around them.

12. Prior Knowledge…!
The oxygen
made part of
these process
call Plant
Excretion!
Plant
Excretion…!
This process
is based in
the removal
thing of a
plant

13. Important Part…!
VACUOLE:
 It can be used for either storage of
useful compunds,or the storage of
waste substances.

14. Functions…!
 Plant produce a variety of organic and
inorganic substance as- by produvts
during metabolism variety of ways.

15. Types Of Waste…!
Oxygen can be looked upon as a waste
product of photosynthesis and
carbon dioxide a waste product of
respiration.