Rabbit Respiratory and Cardiac System
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49 Terms
What are the main organs in the rabbit's thoracic cavity?
Lungs, heart, vasculature, and thymus
What is unique about the rabbit's thymus?
It remains large throughout life
Where is the rabbit's thymus located?
Cranioventral to the heart, extending into the thoracic inlet
What percentage of body weight does the rabbit heart represent?
0.20%
How is the rabbit heart positioned compared to dogs and cats?
More cranially
What is unique about the rabbit's aortic nerve?
It has only baroreceptors, no chemoreceptors
What is the normal heart rate range for rabbits?
150-300 bpm
How many cusps does the tricuspid valve have in rabbits?
Two
Which artery supplies most of the rabbit's heart?
Left coronary artery
What is the primary vein for venous blood return from the head in rabbits?
External jugular vein
What are common sites for venepuncture in rabbits?
Jugular vein, lateral saphenous vein, cephalic vein, marginal ear vein
What is the normal respiratory rate for rabbits?
30-60 bpm
Why are rabbits obligate nasal breathers?
The epiglottis is engaged over the soft palate
What sinuses are present in rabbits?
Maxillary and ethmoid sinuses
How many lobes do rabbit lungs have?
Cranial, middle, and caudal lobes
Which lung lobe is larger in rabbits?
Right cranial lung lobe
What is the main muscle responsible for breathing in rabbits?
Diaphragm
Why are rabbits prone to respiratory failure?
Diaphragm is the only significant breathing muscle
What is a sign of respiratory distress in rabbits?
Open-mouth breathing
How should auscultation of rabbit lung fields be performed?
Split into quadrants, assessing upper and lower areas on both sides
What makes intubation challenging in rabbits?
Small glottis, large tongue, and strong vocal cords
What is a common cardiovascular condition in rabbits?
Stress-induced cardiomyopathy
Why are rabbits used in atherosclerosis research?
They exhibit hypercholesterolaemia quickly on high-cholesterol diets
What is a sign of advanced congestive heart failure in rabbits?
Open-mouthed breathing and dyspnoea
What is unique about the rabbit's thoracic cavity?
It's small compared to body size
Why is the rabbit prone to respiratory failure?
The diaphragm is the only significant breathing muscle
What is the normal respiratory rate for rabbits?
30-60 breaths per minute
How are rabbit lung fields typically auscultated?
Split into quadrants, assessing upper and lower areas on both sides
What is unique about the rabbit's thymus?
It remains large throughout life
Where is the rabbit's thymus located?
Cranioventral to the heart, extending into the thoracic inlet
What percentage of body weight does the rabbit heart represent?
0.20%
How many cusps does the tricuspid valve have in rabbits?
Two
What is unique about the rabbit's aortic nerve?
It has only baroreceptors, no chemoreceptors
Which artery supplies most of the rabbit's heart?
Left coronary artery
What is the primary vein for venous blood return from the head in rabbits?
External jugular vein
Why are rabbits obligate nasal breathers?
The epiglottis is engaged over the soft palate
What sinuses are present in rabbits?
Maxillary and ethmoid sinuses
How many lobes do rabbit lungs have?
Cranial, middle, and caudal lobes
Which lung lobe is larger in rabbits?
Right cranial lung lobe
What is a sign of respiratory distress in rabbits?
Open-mouth breathing
What makes intubation challenging in rabbits?
Small glottis, large tongue, and strong vocal cords
Why are rabbits used in atherosclerosis research?
They exhibit hypercholesterolaemia quickly on high-cholesterol diets
What is a common cardiovascular condition in rabbits?
Stress-induced cardiomyopathy
What is a sign of advanced congestive heart failure in rabbits?
Open-mouthed breathing and dyspnoea
How does the rabbit's pulmonary artery differ from other species?
It is heavily muscular
What is unique about the rabbit's coronary circulation?
Poor collateral circulation, making it prone to ischemia
How many cranial vena cavae do rabbits have?
Two (left and right)
What is the recommended stethoscope for examining rabbits?
Pediatric stethoscope
Why should heart rate and respiratory rate be measured early in a rabbit exam?
To avoid stress-induced increases