Urinary System Flashcards
(10 cards)
Functions of Urinary (excretory system)
Excretion (gets rid of metabolic wastes)
Ø Among most important wastes are the
nitrogenous wastes
–Produces of proteins and nucleic acids
What form do aquatic animals excrete nitrogenous waste?
What form do mammals excrete nitrogenous waste?
What form do Birds, many reptiles insects and snails excrete nitrogenous waste?
Ammonia
a fish pump will remove ammonia from water
Urea- pee
Uric acid
Pathway of urine in urinary system
- Kidneys produce urine
- . Urine goes to 2 ureters
- To the urinary bladder x1
- Then to the urethras
- Urinary opening
What are the 2 major parts of the kidney?
outer Cortex
inner Medulla
also a renal pelvis (looks like a cauliflower)
What is the functional unit of the vertebrate kidney?
Structure
What is a glomerulus
What doe the nephrons do?
The
nephron
Ø
Consists of a single
long tubule
and a ball of capillaries
called the glomerulus
network of blood vessels/ capillaries
drain the secretions into the ‘pelvis’ of the kidney
What do kidneys do?
Remove nitrogenous waste
make urine
Water balance regulation
Electrolytes regulation
What 4 steps are involved in the production of urine?
filtration
reabsorption
Secretion
Excretion
Filtration:
Reabsorption
The excretory tubule collects a
filtrate from the blood
Water and solutes
are forced by blood
pressure
into the excretory tubule
Valuable substances are
reclaimed from the filtrate and
returned to the body fluids
Secretion:
Excretion
Other substances, such as toxins, are extracted from body fluids and added to the contents of the excretory tubule
The filtrate leaves the body
What do you require with kidney failure?
Why do people get kidney disease
Dialysis
Machine will filter your blood and produce urine.
3 times a week
polycystic kidney disease- kidneys turn into fibrous tissue
