Lecture 27/28: Rabbits vs. Rodents Flashcards
T/F rabbit hair is very delicate
true: easily to tear or rip when clipping fur
What is a key way to differentiate a female rabbit from a male rabbit
female rabbit possesses dewlap
T/F rabbits lack footpads
true
There is a risks of _______________ at the points of the hock and tips of ____________
pododermatitis, third phalanges
What are the glandrous areas of a rabbit
nose tip, scrotal sacs, inguinal folds
List the areas of the Rabbits scent gland
*chin gland
*perineal glands
*inguinal glands
What is being pointed to
Inguinal scent glands Perineal scent glands
Cornea of eye is ____% of the eyeglobe
30%
what is the eye position of a rabbit? what does this allow for?
lateral position of eye globe in skull
wide field of view by O.U (both eyes)
what kind of vision do rabbits have
Biocular vision
O.U. =
O.D. =
O.S. =
O.U. = ocular universal
O.D. = ocular dexter
O.S. = ocular sinister
Lagomorpha Peg teeth
What kind of teeth do rabbits have
Hypsodont
How many incisors do rabbits have? rodents?
rabbits: 6 incisors (2 upper L and R)
rodents: 4 incisors (1 upper L and R)
How are rabbits and horses similar
- very large masseter and temporal muscles due to grinding teeth
- don’t tend to open mouth too wide
What kind of digestive tract do rabbits have/ how is the GI tract similar to horses
hindgut fermentation
Why is it common for rabbits to experience GI problems
due to them being hindgut fermenters (colic)
What organ is this? How is it orientated
cecum: superficially located in caudal
peritoneal cavity
WHERE IS THE DESCENDING DUODENUM LOCATED??????
ON THE RIGHT SIDE OF THE ABDOMEN
he repeated this a million times!!*
Identify A-D
what type of feces do rabbits have
Pellets and Caecotrophs
what is caecotroph
“night feces”
Fermented in cecum
what unique feature do rabbits exhibit with their feces
2 types of feces (night and pellet)
Coprophagy(eat) of cecotrophs
Is it normal that rabbits eat their feces
YES, they are the ONLY species that it is normal in!
What is unique about the rabbit uterus
duplex uterus (2 cervix)
evolved to be able to make more babies because they are eaten SO often by predators
difficult to spay them
Rabbit Reproductive tract differences from
small carnivorous mammals
List the 4 reproductive differences
*2 cervices
*abundant adipose in broad ligament
*numerous large vessels in broad ligament
*lacking thick suspensory ligament
Ovary; female rabbit, “doe”
**ovary is a cylinder shape
** have to know its a duplex uterus (Dr. Nader said a million times)
what is a male rabbit called
a Buck
What happens if the inguinal fat pad is damaged/torn during SX
makes it an open hematoma
makes them more prone to herniation
(Dr.Nader said a million times)
what are the shape of the rabbit’s testicles
elongated; lateral to penis
what is the route of sperm
Testicle– Head, body, Tail of epididymus– ductus deferns
what animal is this? where do they normally live?
Long-tailed Chinchilla
Natural Habitat: Andes Mountain & high elevation terrain
what is significant about the chinchillas (rodent) skull
HUGE tympanic bulla allowing for great hearing
Huge pinna to capture sound
Hypsodont teeth like rabbit/horse
point= lingual/buccal teeth
How are the incisors of a rodent oriented
single incisor for each quadrant (101,201,301,401)
Why are the teeth yellow on the chinchilla
the more enamel the darker the color
T/F Rodents have chisel shaped teeth
true; helps because their teeth are always growing
- tympanic bulla
- diastema
term for rabbit incisor teeth that continuously growing throughout life of mammal
what teeth matches this term
elodont
what is the term for high crowns to teeth
irregular occlusal surfaces, enamel crests &
dentinal grooves, cheek teeth, both premolars & molars
hypsodont
what teeth are these and what type
Rodent incisors = elodont type
Chinchilla & Guinea pig premolars & molars =
elodont (incisors) & hypsodont type (premolar and molar)
Chinchilla & Guinea pig tooth types:
*elodont
*hypsodont
gerbil, hamster, mouse & rat: teeth type
anelodont (premolars & molars)
elodont (incisor teeth)
brachyodont (premolars & molars)
anelodont:
Growing or non-growing throughout life
not growing throughout life
elodont:
Growing or non-growing throughout life
continuously growing throughout life of mammal
Term for low crowns to teeth
brachyodont
what type of teeth are these
Rodent incisors = elodont & hypsodont type
what key thing should you look for when identifying the ileum
antimesenteric iliac a.
- stomach
- liver
- SI
Rats are herbivores/omnivores/carnivores?
omnivores
T/F rodents have a single chambered stomach
true
T/F Norway (Lab) rat do NOT possess a gall bladder
TRUE
what kind of cervix do rats have
Single cervix
elongated horns to hold large number of offspring
T/F Rat testicles are very identifiable (very big(
true
Norway rat: Rattus norvegicus;
possess ___ pairs of mammary glands;
___mammary glands in total
6 pairs ; 12 in total
Identify mammary glands 1-6
Why is it important for Norway (Lab) rats to have 12 mammary glands
Need large number to supply large number of offspring
what is this rat suffering from
Mammary gland neoplasia
(Lab rats=high prevalence)
T/F Guinea pig tend to have twins
true
what is significant about the guinea pigs pelvis
*if sow does not have litter prior to fusion of pubic symphysis by 6 – 9 months, dystocia common
*If sow has litter before fusion of pubic symphysis, then cartilage union forms & persists for life.
Guinea pig sow w/ 2 feti; close to parturition event;________________ ligaments open prior to delivery of large feti.
Pubic symphysis
T/F Dystocias is relatively common in both guinea pigs and chinchilla
true
guinea pigs and chinchilla are known as being precocious
what does that mean
showing the qualities or abilities of an adult at an unusually early age
_____________expands prior to parturition to allow passage of large feti
Cartilage union
haha jumpscare
