GRADE 10 LIFE SCIENCES
BY KAMATI VUYO
ALEJANDRA, C. ANDREW, P . BRONTE, S. CAMILA, M . KIM, P .
The excretory system is a passive biological system
that removes excess, unnecessary materials from
an organism and prevent damage to the body
The matter, such as urine or sweat, that is so
The act or process of discharging waste
matter from the blood, tissues, or organs.
What the Excretory System does
The system removes metabolic waste from
the body. One of the main parts of the
Excretory System is the kidney. The waste
products arrive in the kidneys then the
kidneys then start a process that removes
hazardous toxins and products that the body
can not use. The kidneys then mix the waste
products together to form a liquid called
urine. The urine then goes to the bladder and
is kept there until it is released via the Uretha.
The kidney is a reddish brown, bean
shaped organ which is present in
each of the sides of the Vertebral
The skin is another part of the
excretory system: it eliminates
sweat, that helps cool the body and
regulate the concentration of salt
normally arise off the side of
the abdominal aorta, immediately
below the superior mesenteric
artery, and supply the kidneys with
Are endocrine glands that sit at
the top of the kidneys the right
adrenal gland is triangular
shaped, while the left adrenal
gland is semi lunar shaped. They
are chiefly responsible for
releasing hormones in response
The renal veins are veins that drain
the kidney. They connect the kidney
to the inferior vena cava. They carry
the blood purified by the kidney.
vein is the vena cava that carries
de-oxygenated blood from the
lower half of the body into the right
atrium of the heart.
refers to one of two muscles used to
control the exit of urine in the urinary
bladder through the urethra.
Are muscular ducts that
propel urine from the kidneys
to the urinary bladder. In
humans, the ureters arise from
the renal pelvis on the medial
aspect of each kidney before
descending towards the
The urinary bladder is the organ that
collects urine excreted by the
kidneys prior to disposal
by urination. It is a hollow muscular
, and sits on the pelvic floor
The dorsal aorta give branches to
the yolk-sac, and are continued
backward through the body-stalk as
the umbilical arteries to the villi of
In anatomy is a tube which
connects the urinary bladder to the
outside of the body.
produced as a result of break
down of hemoglobin in the worn out
red blood cells in the liver and
excreted with the bile into the
duodenum and removed along with
the feces .
A problem that can happen in the Excretory system is Urinary
tract infection- This is usually due to a bacteria which can
cause burning during urination. It is usually treated with
Kidney stones- These are small hard deposits that develop in
the kidneys. They can cause severe pain in the stomach and
back. Surgery may be required if they are to expand.
Cystitis is an infection in the bladder, due to bacteria.
Blood in the urine- is a sign of a problem usually due to an
urinary tract infection or kidney stones. Sometimes, it can be
due to a more serious problem such as cancer.
HOW TO LOOK AFTER YOUR
adequate amounts of water.
a nutritious diet consisting of
fruits, vegetables, grains, and nuts.
away from drugs, alcohol and
Large Intestine collects waste
from throughout the body.
It extracts any remaining (usable)
water and then removes waste.
Urethritis is an inflammation of the urethra
caused by a bacterial or viral infection.
Symptoms of urethritis vary between sexes. A
symptom in men can be seen as blood in the
urine or semen or even a discharge containing
puss. In women, abdominal pain, pain during
urination and fever may occur.
How it Works with Other Systems
Blood that circulates through the body passes
through one of the two kidneys. Urea, uric acid, and
water are removed from the blood and most of the
water is put back into the system
Monitors levels of compounds and fluids
Kidney function must be constantly altered to
provide the best internal environment for your cells
If too much water is present, hormones are released
that allow for more urine production. If the body is
dehydrated, less urine will be produced
Adrenal gland position on the top of each kidney.
Adrenals release adrenaline into your body
WHICH IS THE RELATIONSHIP BETWEEN
WATER AND EXCRETION?
is essential for digesting food. It is
also important for getting rid of various
toxic elements from the body, in the form of
urine, sweat and faecal matter.
Water helps to cushion our joints and
prevents shocks in them.
Water present in blood is the carrier of
oxygen and nutrients to all our body cells.
This presentation is a mash up of 5 different sources & they are:
Alejandra, C. (2010). H20 = Excretion.
Andrew, P. (2012). Human Excretory system.
Bronte, S. (2011). The Excretory system
Camila, M. (2012). The Excretory system.
Kim, A. (2013). Excretory system. http://www.slideshare.net/kimangelie/excretory-system25809066?qid=c8c6b535-ef05-4631-9334-0db24bdc032d&v=default&b=&from_search=10