Title: Homeostasis
1Homeostasis
- The kidney
- The gross structure of the urinary system
2Introduction
- The urinary system rids the body of waste
materials and controls the volume and composition
of body fluids. - Highly specialized cells in the kidneys are
essential to these processes.
3Introduction
- The urinary system is composed of paired
kidneys and ureters, the urinary bladder, and the
urethra. - Urine is produced in the kidneys, and then
drains through the ureters to the urinary
bladder, where the urine is stored. - Urine is eliminated from the body through the
urethra.
4The Urinary System
5The Urinary System
The kidney
6The Urinary System
The kidney
ureter
7The Urinary System
The kidney
ureter
bladder
8The Urinary System
The kidney
ureter
bladder
urethra
9The Urinary System
The kidney
dorsal aorta
ureter
bladder
urethra
10The Urinary System
inferior vena cava
The kidney
dorsal aorta
ureter
bladder
urethra
11The Urinary System
inferior vena cava
The kidney
renal vein
dorsal aorta
ureter
bladder
urethra
12The Urinary System
inferior vena cava
The kidney
renal vein with renal artery behind
dorsal aorta
ureter
bladder
urethra
13The Urinary System
adrenal gland
inferior vena cava
The kidney
renal vein with renal artery behind
dorsal aorta
ureter
bladder
urethra
14Kidney function
- Each bean-shaped kidney is embedded in a fatty
adipose capsule. - The kidneys are retroperitoneal, lying against
the dorsal body wall in the upper abdomen.
15Kidney function
An adrenal gland, which is part of the
endocrine system, lies on top of each kidney.
Several structures enter or exit the concave
surface of the kidney at the renal hilus,
including the ureter and the renal vein, which
drains into the inferior vena cava.
16The kidney
17The kidney
ureter
18The kidney
renal pelvis
ureter
19The kidney
renal cortex
renal pelvis
ureter
20The kidney
renal cortex
renal pelvis
renal medulla
ureter
21The kidney
renal cortex
pyramids
renal pelvis
renal medulla
ureter
22Kidney blood supply
23Kidney blood supply
When the renal vein is removed and the kidney
is shown in frontal section, you can see the
deeper renal artery and its connection to the
abdominal aorta.
24Kidney blood supply
Together, these vessels provide the kidneys
with a rich blood supply under high pressure that
allows them to continuously filter and cleanse
the blood.