Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Cat Urinary System: Vet-Verified Health Guide (With Diagram)

Share

cat coming out of a litter box

Cats’ urinary systems remove waste products, ensure proper electrolyte balance, and help with vitamin D processing. The urinary system has several organs, including the kidneys, bladder, urethra, and ureters, which run from the bladder to the kidneys.

The urethra is the tube through which urine leaves the body. Kidneys help remove waste from cats’ bodies and contribute to the maintenance of electrolyte and mineral balance. They also make the hormones and enzymes required to maintain blood pressure and produce red blood cells. The bladder holds urine until it’s released through the urethra.

divider 2 cats

Feline Kidney and Bladder Anatomy

The kidneys are composed of the medulla, renal pelvis, and nephrons. A cat’s bladder anatomy is relatively simple; each has an apex, body, neck, and a series of muscles that allow cats to hold and release urine.

Male-vs-Female-Cat-Urinary-System
You are free to use this image but we do require you to link back to Catster.com for credit

divider cat paws 2 oct 2024

Common Urinary System Health Issues

Cats can suffer from infections almost anywhere in their urinary systems. They can also develop urethral blockages, which are emergency situations that can make it impossible for them to urinate.

Disorders such as amyloidosis and polycystic kidney disease can create severe kidney problems, and cats can be born with bladder, kidney, and urethral deformities. They can also develop conditions such as chronic kidney disease, as well as cancerous and benign tumors.

divider 1 paws

Ways to Support Feline Urinary System Health

Pet parents can take several steps to support their companions’ urinary system health, including ensuring they drink enough water, exercise, stay at appropriate weights, and have squeaky-clean litter boxes.

Hydration

Cats often drink less water than they should for their modern diet, which is hazardous to their health, and ensuring they stay properly hydrated is incredibly important for maintaining healthy urinary systems. Cat fountains can encourage drinking, and wet food is an easy (and tasty) way to boost their hydration.

Weight Management

Obese cats may be at increased risk of developing certain urinary system conditions. Ensuring they stay at appropriate weights is one of the most important things pet parents can do to support their companions’ health.

Ensuring your cat doesn’t gain too much weight is far easier than getting them to drop a few pounds. Most cat food comes with handy feeding information on the package that you can use to determine how much their cats should consume. However, you can also consult a veterinarian for feeding tips and brand recommendations.

Need veterinary advice but can't get to the clinic? Catster recommends PangoVet, our online veterinary service. Talk to a vet online and get the answers and advice you need for your cat without having to leave your living room — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

Stress Management

Stress can play a role in the development of urinary problems, and ensuring your cat has a comfortable environment where their needs are met and doing everything possible to minimize stressful events are vital to supporting their mental health.

Cats thrive when they have activities and toys to keep them engaged and entertained. You can buy several toys, including interactive products and food puzzles, that provide mental stimulation and physical activity. Interactive toys can keep your cat happy when you’re away, and plush toys or teasers are ideal when you can engage with them.

They also benefit from having scratchers to keep their claws healthy and high perches to survey their territory. Sticking with routines and providing enough time to adjust to new foods, schedules, and pets makes it easier for them to acclimate to changes.

Litter Box Management

Cats prefer to have clean litter boxes, and daily scooping is essential for their happiness and health. Setting up litter boxes in places where they can’t relax, such as busy hallways or locations where other pets can interrupt them, can make going to the bathroom a less-than-pleasant experience.

When your cat is unhappy with the condition or location of their litter box, they may avoid going to the bathroom as often as they should, which is harmful to their urinary system.

Did you know there's an enzyme cleaner that does it all? The Hepper Advanced Bio-Enzyme Pet Stain & Odor Eliminator Spray permanently removes the very worst smells and stains (truly, everything you can imagine!), and they offer a 100% satisfaction guarantee! Click here to get yourself a bottle.

Hepper Advanced Bio-Enzyme Pet Stain & Odor Eliminator Spray
  • ADVANCED ENZYMATIC CLEANER - Penetrates the most stubborn smells and stains at the deepest molecular...
  • FOR ANY MESS, ON ANY SURFACE - This pet odor eliminator cleans your carpets, floors, furniture,...
  • FRESH, NATURAL ODOR - Our unique formulation doesn't rely on dangerous or unpleasant chemical...

At Catster, we’ve admired Hepper for many years, and decided to take a controlling ownership interest so that we could benefit from the outstanding products of this cool cat company!

divider 2 cats

Frequently Asked Questions (FAQ)

How Do Cats Pee?

Ureters bring urine from the kidneys to the bladder, which stays relaxed until it’s full. When it’s time for a cat to urinate, their bladder wall contracts and their urethral sphincter muscle relaxes to allow urine to leave the body.

Is Spraying the Same as Peeing?

Cats spray to mark their territories, not to relieve themselves. They do so standing up, while most pee squatting.

cat spraying the bush
Image Credit: Helen Liam, Shutterstock

divider cat paws 2 oct 2024

Conclusion

A cat’s urinary system consists of two kidneys and ureters, a bladder, and a urethra. The kidneys filter waste from the body and are essential for maintaining proper electrolyte balance.

Hormones and enzymes made by the kidneys also play critical roles in red blood cell development and blood pressure regulation. If your cat’s litter box habits change suddenly or you notice other troubling signs, contact a veterinarian to ensure they’re not suffering from an illness or behavioral condition.


Featured Image Credit: Natasha Zakharova, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

What Feral Cats Actually Need From the People Who Feed Them

Feral cats are everywhere. Slipping between parked cars, darting under porches, appearing briefly at dusk before vanishing again. Most people see them, feel...

Capturing Catstanbul

Istanbul – famous for its bustling markets, unique architecture, and vibrant culture, there is one more feature of this Mediterranean capital that deserves...

Ask Dr. Paola – Help! My Male Cat Gets Into Fights! (March 9, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Why Your Cat’s Poop Smells Like a Biohazard

Nobody enjoys litter box duty, but sometimes it gets unbearable. The smell hits you from across the room. You’re scooping faster, lighting candles,...

More related

Conversion Therapy with Clutch: Turning Cat Haters Into Cat Lovers

Hi, I’m Dr. Karyn! Read my introduction to learn more about me and meet my five hilarious cats: Clutch, Cyril, Alex, Zelda, and...

15 Common Cat Myths That Need to Be Debunked (Vet-Verified)

According to the American Veterinary Medical Association, there are at least 60 million pet cats in the United States. With so many cats...

How Much Do Snowshoe Cats Shed? Our Vet Answers & Provides Tips

The Snowshoe cat is a medium-to-large breed of cat. Originally a natural mutation found in a litter of Siamese kittens, the breed was...

Burmese Cat Breed Info: Pictures, Traits & Facts

Burmese cats are incredibly popular companion animals, and for good reason! They’re sweet, smart, active, loving, and enjoy hanging out with their favorite...

Keep reading

Why Has My Cat Suddenly Stopped Eating: 13 Vet-Reviewed Reasons

Cats tend to be fond of food, so if your cat suddenly stops eating, it’s common to feel that something terrible is wrong with them. And there are some cases where your cat isn’t eating because they aren’t feeling well....

cat in front of a bowl with meat and vegetables

How Long After Flea Treatment Can I Pet My Cat? Vet-Approved Facts & FAQ

Fleas are a pain for many pet owners. Though fleas can strike all year round, you are most likely to see them during the warm summer months. To keep these pesky bugs at bay, you will likely need to apply...

adorable cat get pampered by owner

Can Cats Eat Crackers? Vet-Verified Facts & Safe Alternatives

Our feline friends expend so much of their energy during the day playing or hunting down food. The more active their bodies get, the higher the metabolic rate. That means that they will eventually get exhausted and will need sustenance....

Can Cats Eat Crackers

Can Cats Smile? 5 Vet-Approved Ways to Tell if Your Cat is Happy

Sometimes cats make a face that makes you wonder: is my cat actually smiling at me? It looks just like a smile: closed eyes and a mouth turned upward. Cats do have the muscular ability to make facial expressions that...

happy cat

Is It Ok to Have Just One Cat? Vet-Verified Facts & Care Tips

Cats, although seemingly aloof, are social creatures that need to be around other cats or animals to live happy lives. Most cats love being around their humans and the attention they get, but there’s one question many cat owners have...

a woman holding a cat on her lap

How To Tell Which Cat is Dominant? 5 Vet Approved Signs To Look For

Contrary to the aloof and standoffish stereotype that’s been given to cats, cats have a wide range of personalities and temperaments. Some may have the independent personality that they’re known for, but many domesticated cats are very social and love...

two cats playing on a hammock at home

Can Cats Eat Mussels? Vet-Verified Nutritional Facts & FAQ

Slimy—yet satisfying. If you grew up eating seafood, you’re probably familiar with mussels. These shellfish are full of health benefits for humans, but don’t be afraid to share. Your cat would probably enjoy a little bit of your mussels too,...

Can Cats Eat Mussels

11 Best Cat Foods for Sensitive Stomachs & Vomiting in 2026 – Reviews & Top Picks

We all know just how finicky kitties can be when it comes to eating. But aside from their pickiness, others can have quite sensitive bellies that don’t react well to certain ingredients. Since cats are obligate carnivores, eating diets full...

cat lying near bowl with food

Love Cats? So Do We! Join the Catster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Catster Email Newsletter

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.