▲This brown bear is one of six adults and three orphaned cubs that were rescued from illegal private zoos all over the country and taken to the Four Paws Bear Sanctuary in Priština.

▲Liesel, Budapest Zoo's oldest gorilla, about to undergo surgery to remove a tumor in her uterus. She was 32 years old at the time.

▲This false killer whale baby was rescued near the shores of Tofino in bad shape, but received 24-hour care at the Vancouver Marine Mammal Rescue Centre.

▲Igor, a then-13-year-old Siberian tiger, is still out from the non-invasive stem cell surgery he underwent at Szeged Zoo.

▲A veterinary physiotherapist turned her São Paulo home into a hospital to care for then-three-year-old Ariel in an effort to cure a rare autoimmune disease that paralyzed the animal's legs.

▲The Syrian brown bear Mango, then 19 years old, underwent an unprecedented surgery at the Ramat Gan Safari to repair a herniated vertebra.

▲This injured green sea turtle was treated at the University of Concepción after being found by fishermen.

▲An Andean condor, one of the world's biggest flying birds, receives treatment after at least 20 of them were found poisoned next to a road in Los Andes.

▲The jaguar Tango, then 11 years old, had his DNA entered into the country's DNA bank, an effort that could help save this vulnerable species.

▲Xin Xin, a female giant panda, is having blood drawn at Chapultepec zoo in Mexico City.

▲An X-ray shows the leg of Juba, a cheetah cub, who was operated at Chester Zoo to mend a fracture in his right ankle.

▲This monkey is still out from the anesthesia administered before its sterilization procedure in Shimla.

▲The lioness Fafá, then 17 years old, receives a CT scan in Brasilia to help pinpoint the cause of her seizures and bleeding.

▲Then nine months old, Juba is seen here before the operation to insert a metal plate in his fractured ankle.

▲Chris P. Bacon, the piglet, was born with a condition in his hind legs that prevented him from walking, but veterinarian Len Lucero (pictured) fashioned a wheelchair out of K'Nex toys to help him walk.

▲This rescued stray is being sterilized at a shelter near Bucharest so he can be ready for adoption.

▲An injured koala receives treatment at Queensland's Australian Wildlife Hospital, which was built as a living memorial to famed conservationist Steve Irwin.

▲This boa constrictor receives vaccination at the Castanheiras Pied Tamarin Wildlife Refuge in Manaus.

▲This doggo looks peaceful as he undergoes surgery in Nice.

▲This baby kodkod, the smallest species of wildcat in the Americas, was found abandoned in the woods near Concepción.

▲This black-and-white ruffed lemur is being cared for at the family-owned Palmyre Zoo in Les Mathes.

▲This cat is getting ready for surgery to mend a broken leg in Berlin.

▲A PDSA vet tends to an injured swan.

▲A then-six-month-old female camel drinks from a bottle as her mother was denying her milk at the London Zoo.

▲A mobile vet bandages the injured leg of a dog in New York, while the young owner anxiously watches.

▲An English sheepdog is examined by a vet in London.

▲This lioness is being readied for a CT scan, which will help determine whether she suffers from vitamin A deficiency.

▲A dog receives treatment in a mobile clinic run by the Blue Cross in London.

▲An Irish Sport Horse is hoisted onto an equine operating table at Newmarket Equine Hospital.

▲A poodle, fitted with a bathrobe, pays a visit to a drug store for dogs in New York City.

▲Vets check a Warmblood horse after mouth surgery at Newmarket Equine Hospital.

▲Animal welfare pioneer and PDSA founder Maria Dickin caresses a wirehaired terrier named Pat, one of the 92,000 dogs rescued during the Blitz.

▲An orphaned baby duck is weighed upon its arrival at the GREFA hospital in Majadahonda.

▲A couple comfort their shepherd-terrier mix as it receives a new bandage on its leg at a clinic in Berlin.

▲A horse undergoes surgery on a fractured leg while a technician monitors its status at a clinic in Berlin.

▲A vet uses crown forceps to extract a tooth from a horse.

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A vet examines a handsome dog in London.

▲A stray cat is readied for sterilization surgery in Beijing, in an effort to reduce Nanlang's stray cat population.

▲Pete, Hal Roach's pup from 'Our Gang,' has his teeth cleaned, throat sprayed, eyebrows plucked, toenails polished, and ears cleaned by a vet.

▲Following her health check, this baby slender loris soundly falls sleeps in the hands of a vet.

▲Chocolate, a miniature dachshund, looks confused as it receives acupuncture therapy at the Marina Street Okada animal hospital in Tokyo.

▲A thoroughbred is readied for an operation at Newmarket Equine Hospital.

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While most of us don't enjoy going to the doctor, we sure appreciate their caring hands and knowledge when we're at our most vulnerable. This reality is not much different in the animal world. While some look scared, others look peaceful, grateful, and even fall asleep after being cared for.

Click through the following gallery for touching images of animals being cared for by professionals.

▲A then-two-year-old orangutan receives a health examination at Kao Pratubchang Conservation Centre in Ratchaburi.

▲Dylan the chimpanzee undergoes a cardio ultrasound examination at Chester Zoo in Liverpool.

▲A toucan with a fractured leg receives electroacupuncture treatment at the veterinary hospital in Brasilia's zoo.

▲A white Bengal tiger cub receives a check-up by vets of Huachipa's private zoo in Lima.

▲Reyna, a rescued female jaguar, receives dental treatment at a veterinary clinic in Envigado, near Medellín.