Transcript Ch 24 – Urinary System, Part II - WebStarts

Ch 24 – Urinary System, Part II
Learning Objectives
continued
Homework: Read pgs
876 – 882, 889 – 902.
Review anatomical
structures on labeling
practices.
Review: Urinary System
4?
1?
2?
3?
Review: Bladder
5?
1?
2?
3?
4?
All About the Kidneys
• Bean-shaped organs protected by
last floating rib
• Rt. kidney is slightly _____ than
the left
• Mass = __ oz
• Average dimensions = 12cm long
x 6cm wide x 3cm thick
Roughly the size of a large bar of soap
External Anatomy of Kidney
Instructions: Label your practice diagram.
Internal Anatomy of Kidney
Instructions: Label your practice diagram.
Note: Smooth muscle lines the walls of the calyces, pelvis,
and ureters. Propels urine by peristalsis.
Physiology of Kidney Structures
Instructions: Match ‘em up!
1. calyces
2. capsule
3. renal
pelvis
4. medulla
5. hilum
a. funnel-shaped tube that leaves
via the hilum and is continuous
with the ureter
b. layer deep to the cortex which
exhibits cone-shaped tissue
masses
c. areas that collect urine
d. fibrous outer surface of kidney
e. cleft; visible from external view
of kidney
Blood Flow Through the Kidney
4.Flows into the
veins
1.Blood flows into the
kidney via the renal
a_________
5. Veins flow
blood out of
the kidney
through the
renal
_______
2. Continues along
other sub-arteries
3. Into arterioles
and capillary beds
(red) which then
mix with venous
arterioles and
capillaries (blue)
Reflect
Take a moment to retrace the flow of blood through the kidney beginning
with the renal artery. Draw on your diagram below.
Review
Can You Name the Structure?
7.?
8.?
1.?
6.?
2.?
3. ?
5.?
4.?
How Do Kidneys Filter?
• Each kidney contains over 1 million tiny
blood processing units called __________
• Fluid is carried along _____________ and
conveys to the renal pelvis
nephron
Nephrons, scanning electron micrograph
Basic Nephron Anatomy
Label your practice diagram.
Renal corpuscle
Challenge Questions
NOTE: There are two different
types of nephrons (shown
here).
1. What are the two types?
(see diagram pg 882)
2. Where are they located?
(pg 881)
3. What’s the most common
type? (pg 881)
Kidney Physiology
• Approximately 1200ml of blood passes
through the glomeruli each _________
• Of that, 650ml is ______
• This = filtering your entire plasma volume
more than 60x/day
• Of all the fluid filtered, less than 1% leaves
the body as ________. Most of the filtered
fluid (filtrate) is returned to the blood.
See a nephron filter: http://video.google.com/videoplay?docid=9053444201853192779&q=nephron&total=21&start=0&num=10&so=0&typ
e=search&plindex=0
Hormonal Influence on the Kidneys
• _________ inhibits urine output. It is
released more or less continuously unless
the blood solute concentration drops too
low.
• It is enhanced by any event that raises the
loss of plasma such as _________
• Results in ___________ urine
Diuretics
Instructions: With a partner, review “Diuretics” pg
899. Complete the following:
1. What are diuretics?
2. List two examples of diuretics (one naturally
occuring and one prescribed Rx)
a)
b)
Concluding Discussion
• Why might someone need a diuretic?
http://video.google.com/videoplay?docid=77376416449476
40414&q=leg+edema&total=39&start=0&num=10&so=0&ty
pe=search&plindex=0