The Excretory System C15L3

The Excretory System
C15L3
Primary functions
1. the removal of wastes and foreign
substances and excess substances
from the blood
2. the temporary collection and storage
of these substances
3. the elimination of these substances
from the body
4. regulates the level of fluid in the body
The excretory system is made of
four body systems.
Functions of the Excretory System
(cont.)
The urinary
system processes,
transports,
collects, and
removes liquid
waste from the
body.
Organs of the urinary system
Kidneys
Ureters
Bladder
Urethra
Organs of the urinary system
The organs of the
urinary system
work together to
process, transport,
collect and excrete
liquid waste.
Organs of the urinary system
• The bean-shaped organ
that filters, or removes,
wastes from blood is the
kidney.
• The body has two
kidneys, one on each
side of the body, near
the back wall of the
abdomen, above the
waste, and below the rib
cage.
Kidney function
filter wastes
from the blood
and excretes
them in a
liquid called
urine
Kidney
nephron: a
network of
capillaries and
small tubes, or
tubules, in the
kidneys, where
filtration of
blood occurs.
Nephron
Your entire
blood supply
is filtered by
your kidneys
around 60
times each
day.
ureters
Urine leaves each
kidney through a
tube called the
ureter and goes
to the urinary
bladder
urinary bladder
muscular bag
that
temporarily
stores urine
urethra
tube that
leads from
the bladder
to the outside
of the body
urethra
Urine leaves the
bladder through a
tube called the
urethra which
contains circular
muscles called
sphincters that
control the release
of urine.