The kidneys contains millions of tiny filtering units called
(1 point)
Responses

urine.
urine.

villi.
villi.

peristalsis.
peristalsis.

nephrons.
1 answer
nephrons.
(1 point)
Responses

urine.
urine.

villi.
villi.

peristalsis.
peristalsis.

nephrons.
1 answer