Excretion is the process by which waste products are eliminated from organisms. In plants, waste is excreted through various methods like releasing oxygen during photosynthesis, transpiration of excess water, and shedding of waste-containing leaves. Vacuoles can also store waste. In animals, the main excretory products are carbon dioxide, ammonia, urea, uric acid, guanine, and creatine. Aquatic animals excrete ammonia directly into water, while terrestrial animals convert ammonia into other nitrogenous compounds due to less water. Birds excrete uric acid paste for efficient water retention. Insects use Malpighian tubules to excrete waste into intestines and release it with f

1. BIOLOGY PRESENTATION
EXCRETIONINPLANTSAND
ANIMALS

2. INTRODUCTION
HI,I am Vasudha of
Darshan Academy and here
I am going to talk about a
very interesting topic of our
daily lives.

4. • Excretion is the process by which waste products of
metabolism and other non-useful materials are eliminated
from an organism. In vertebrates this is primarily carried out
by the lungs, kidneys and skin. This is in contrast with
secretion, where the substance may have specific tasks after
leaving the cell. Excretion is an essential process in all forms of
life. In humans urine is carried out through the urethra and
that is part of the excretory system.
• In single-celled organisms, waste products are discharged
directly through the surface of the cell.
• Chemical structure of uric acid.
• In animals, the main excretory products are carbon dioxide,
ammonia (in ammoniotelics), urea (in ureotelics), uric acid (in
uricotelics), guanine (in Arachnida) and creatine.

5. • The excreted material may be called dejecta or ejecta. In
pathology the word ejecta is more commonly used.

8. PRIOR
INFO..
ABOUT
PLANTS This process is
related to the
releasing of
waste products
in pants
EXCRETION
IN PLANTS
The oxygen
made part of
this process is
called
excretion

9. IMPORTANT PART
• VACUOLE-
It can be either used for storage of
useful components or the storage of
waste substances

10. FUNCTIONS…..
• Plant produce a variety of organic and
inorganic wastes substances as by-product
during metabolism activities in a variety of
different ways.

11. TYPES OF WASTE……
• Plants use different strategies for excretion
like releasing oxygen during photosynthesis.
they also deal with carbon dioxide after the
process . Moreover, they get rid of excess
water by transpiration. They shed the waste
containing leaves. Other waste products are
stored as resins and gums, especially in old
xylem.

14. • In animals, the main excretory products are carbon
dioxide, ammonia (in ammoniotelics), urea (in
ureotelics), uric acid (in uricotelics), guanine (in
Arachnida) and creatine.
• Aquatic animals usually excrete ammonia directly into
the external environment, as this compound has high
solubility and there is ample water available for dilution.
In terrestrial animals ammonia-like compounds are
converted into other nitrogenous materials as there is
less water in the environment and ammonia itself is
toxic..
Animal excretion

15. • Birds excrete their nitrogenous wastes as uric acid in
the form of a paste. This is metabolically more
expensive, but allows more efficient water retention
and it can be stored more easily in the egg. Many
avian species, especially seabirds, can also excrete
salt via specialized nasal salt glands, the saline
solution leaving through nostrils in the beak. In
insects, a system involving Malpighian tubules is
utilized to excrete metabolic waste. Metabolic waste
diffuses or is actively transported into the tubule,
which transports the wastes to the intestines. The
metabolic waste is then released from the body
along with fecal matter.

24. • I WORTHILY THANK MY BIOLOGY TEACHER
MRS. ARADHANA BANSAL MAM TO PROVIDE
ME WITH SUCH AN INTERESTING TOPIC OF MY
DAILY LIVE……
THANKING YOU
VASUDHA
X-B