44.3 mammalian excretory system structure Flashcards
1
Q
centers on a pair of
A
kidneys p963
2
Q
supplied with blood from a
A
renal artery
3
Q
drained of blood from a
A
renal vein
4
Q
urine exits the kidneys from a
A
ureter
5
Q
both ureters drain into the
A
urinary bladder
6
Q
urine is expelled through a tube called the
A
urethra
7
Q
how is urination regulated
A
sphincter muscles close to the junction of the urethra and the bladder
8
Q
outer side
A
the renal cortex
9
Q
the inner side
A
the renal medulla
10
Q
weaving back and forth across the cortex and medulla
A
the nephron
11
Q
the functional unit of the vertebrate kidney
A
the nephron
-=
12
Q
nephron consists of
A
1- a single long tubule and
2- a ball of capillaries called a glomerulus
13
Q
cup shaped swelling at the blind end of the tubule
A
Bowman’s capsule (surrounds the glomerulus)
14
Q
how many nephrons in each kidney
A
millions
