-
snakes have simple, ___ curved teeth
caudally
-
what is the normal # of rows a teeth a snake has? (not counting fangs)
- four rows on top
- two tows on bottom
-
only ___ snakes have fangs
poisonous
-
the two halves of the mandible are held together by a ___ hinge
intramandibular
-
___ bone is elongated and mobile
allows them to "gape"
quadrate
-
snakes have 3 methods of killing
CVS
- constriction
- venom
- swallowing hole
-
snakes have ___ different salivary organs
5
-
when snakes lose a tooth, it ___ grow back
does
-
what organ gives snakes the vomeronasal sense?
jacobsons organ
-
what 2 things does the jacobsons organ play a major role in?
-
snakes have ____ on the forked tongue, and they carry the scent to the ___ organ and they are transferred to the olfactory bulb
-
what are the 6 methods of movement a snake can use?
LSCSSR
- lateral undulation
- slide pushing
- concertina
- sidewinding
- saltation
- rectilinear motion
-
what is the most common method of movement?
what is it aka?
- lat. undulation
- serpentine undulation
-
what 3 things are combined to create lat. undulation?
CWF
- contraction of muscles
- weight distribution
- friction
-
which method of movement is a scrunching and straightening motion?
concertina locomotion
-
which method of movement requires little energy and is used in sand and mud
sidewinding
-
which method of movement requires a large amount of energy and is aka jumping and striking
saltation
-
which method of movement a caterpillar movement- the skin pulls the snake, they move in a straight line like this.
rectilinear motion
-
snakes have a ___ chambered heart
3
-
their heart can ___ so that it can still work efficiently for when they are eating large prey
move
-
a terrestrial snakes heart is located ___ ___ ___ ___
closer to their head
-
an aquatic snakes heart is located ___ ___ ___
in their middle
-
the RPS means that we should use their ___ half to give injections
cranial
-
which lung is the functional one?
right
-
what movement produces respiration
intercostal contraction
-
snakes have a tendency to take ___ to ___ to exhale because they can handle higher levels of CO2
seconds to minutes
-
their eyelids are ___ to form the spectacle
fused
-
what is the anterior spectacle called that is shed during ecdysis?
brille
-
the iris contains ___ muscle allowing them to ___
-
snakes have a wide range of ___
vision
-
the digestive system is a ___ tract
linear
-
their saliva contains more ____ ____ than a mammals so the digestion starts in the mouth
digestive enzymes
-
a venom gland is a modified ____ gland
salivary
-
the anus leads to the dorsal part of the cloaca called the ___
copradeum
-
digestion requires a ____ amount of energy
large
-
their digestive system has been known to ___ ___ when not in use, especially in the large snakes that dont need to eat as often
shut down
-
they have ___ kidneys
bilateral
-
which kidney is more cranial to the other?
right is more cranial
-
ureters empty into the __ in the cloaca
urodeum
-
snakes dont have a ___ just like birds
bladder
-
what is a snakes primary nitrogenous waste?
uric acid
-
fertilization is ___ and can be ___
-
males have 2 ___ testicles and a pair of ____ that are ___
- ceolomic
- hemipenes
- inverted
-
to sex a snake, they are ___ ___, if the probe goes further this means you are in the ____ of a ____
- cloacally probed
- hemipene
- male
-
snakes dont have a ___ making their eggs soft and leathery
uterus
-
70% of snakes are oviparous, this includes the ___ and ___ snakes
this also means they are born with an ___ ___
-
what are the 3 snakes that are ovoviviparous?
BVG
-
snakes dont have a ____ membrane, but scales that serve the same fx
tympanic
-
snakes dont have an outer ___
ear
-
what 2 species have a pit for sensing body heat?
PV
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