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BI 203 Human Anatomy & Physiology II
Snakes don’t micturate, so why do we?
What goes in must come out…
Undigestible food, bile
(bilirubin), dead cells, bacteria =
What about dietary fluids?
What about cellular wastes?
What picks up cellular wastes
(think transport)?
What other system helps clean fluids leaking from
blood?
How is blood cleaned?
BI 203 Human Anatomy & Physiology II
What are the functions of the Urinary system?
•___________ (digestive or metabolic?)
•___________ (loss of > than a “big
slam”/day
What are sources for the other
40% lost daily?
•___________________
What other mechanism(s) can regulate
pH?
•___________________
•________________________________…
remember erythropoeitin?
BI 203 Human Anatomy & Physiology II
What are the main organs of the Urinary system?
?
Main organs:
Pair of ____________
(nephros or renal)
For review:
?
?
?
?
BI 203 Human Anatomy & Physiology II
Gross anatomy!
BI 203 Human Anatomy & Physiology II
What else is there besides kidneys?
____________ = tubes carrying urine to bladder
____________ = storage organ for urine
____________ = tube for urine to exit body
“Plumbing” differs
between genders. From
the kidneys down to the
urinary bladder
anatomy is the same.
However, the ________
are different.
BI 203 Human Anatomy & Physiology II
Take 5!!!
Cystitis is inflammation of the
urinary bladder that typically results
from infections, and urinary bladder
infections often occur when bacteria
from outside the body enter the
bladder. Are males or females more
prone to urinary bladder infections?
Discuss with your
Why? What medical
neighbor and predict
procedure/intervention can lead to
an answer
cystitis?
BI 203 Human Anatomy & Physiology II
Where can one find a kidney?
Location:
Size:
Surrounded by
connective tissue
(__________)
Protected by
renal fat pad (__________)
BI 203 Human Anatomy & Physiology II
What are the anatomical details of the kidney?
__________ =
entrance/exit
__________ =
expanded area of
ureters
__________ =
branches or
funnels
__________ =
bumps or “teats”
__________ =
area of medulla
BI 203 Human Anatomy & Physiology II
What are the anatomical details of the kidney?
Nephrons =
__________ per kidney (1,300,000)
____________ can maintain life
_________ will follow without medical intervention
Flow chart:
BI 203 Human Anatomy & Physiology II
What are the anatomical details of the kidney?
3
5
2 7
1 4
8
6
9
BI 203 Human Anatomy & Physiology II
Where does filtration take place?
Renal corpuscle =
Bowman’s capsule =
BI 203 Human Anatomy & Physiology II
Where does filtration take place?
Filtration membrane =
__________ = openings
that allow water and
small molecules to pass
through easily
__________ = cells that
surround glomerulus;
have filtration slits
BI 203 Human Anatomy & Physiology II
Take 5!!!
Hemoglobin has a smaller diameter
than albumin, but very little
hemoglobin passes from the blood
into the filtrate. Explain why.
Under what circumstances would
large amounts of hemoglobin enter
the filtrate?
Discuss with your
neighbor and predict
an answer.
BI 203 Human Anatomy & Physiology II
What is the route of blood flow through
the kidney?
Characterize
blood entering
& exiting the
kidney.
Blood enters via
renal artery at the
renal hilum.
Artery branches
towards renal
papillae. More branches form interlobar and interlobular a.
BI 203 Human Anatomy & Physiology II
What is the route of blood flow through
the kidney?
Afferent
arteriole to
glomerulus to
Efferent
arteriole to
peritubular
capillaries to
vasa recta,
then back out
BI 203 Human Anatomy & Physiology II
What is the route of blood flow through
the kidney?
Drains into the
interlobular veins
eventually into
interlobar veins
and then
eventually into
Renal vein
BI 203 Human Anatomy & Physiology II
What other anatomy is significant?
Transitional
epithelium
lines the
_______ &
____________
Stratified
&
Stretchy
Contract =