Snake Anatomy

  1. Order and suborder
    • Order: Squamata
    • Suborder: Serpentes
  2. The scale over the cornea of the eye is called a
  3. What is the purpose of the "pits" between the eyes and external nares?
    detection of infrared heat
  4. Boas and pythons have multiple depressions in their upper and lower lips called ______ ______ which contain ______ ______.
    • labial pits
    • infrared receptors
  5. The tongue protrudes through the ______ _____ in the rostral upper lip
    lingual fossa/notch
  6. Snakes have a single ossicle called a ________ which extends from the ______ ear to the _______ bone.
    columella, inner, quadrate
  7. The rattle at the end of the tail is composed of several ______.
  8. The scales on the ventral surface are called
  9. Prior to shedding, the eyes will become cloudy due to _______ secretions
  10. During shedding, the old skin and new skin first divides at the _______. Then the snake crawls out of the skin.
  11. These are paired glands at the base of the tail
    anal scent glands
  12. The adaptation of the mandible that allows for cranial kinesis
    The mandibular symphysis is not fused
  13. The _______ bone is loosely attached to the skull and mandibles which allows for skull movement while swallowing prey
  14. Where are the vestigial pelvic girdles and hind limbs located?
    cranial to the vent
  15. The vestigial hind limbs are composed of _____ and _____.
    femurs, claws/spurs
  16. In the male, this is used to stroke the female during courtship
  17. This form of locomotion involves weaving from side to side
  18. This type of movement is in a straight line and is used during hunting
  19. This type of movement involves leaping sideways and results in traveling obliquely
  20. Some tropical snakes travel from tree to tree by
  21. Name the 6 rows of teeth
    • 2 maxillary
    • 2 palatine
    • 2 mandibular
  22. True/False, teeth are replaced when they are lost and may have several sets throughout their lifetime
  23. These teeth are attached on the lingual aspect of the jaw and are continually replaced
  24. Fangs can be _______ or _______.
    grooved, cannulated
  25. True/False - Only venomous snakes have fangs
  26. This term refers to dentition of non-venomous snakes
  27. This term is for fangs that are erect and located in the back
  28. This term is for fangs that are erect and located in the front of the mouth
  29. This term is for fangs that are folded and located in the front of the mouth
  30. These are modified labial salivary glands located on either side of the maxillae
    venom glands
  31. Where is the tongue located?
    in a protective sheath rostral to the glottis and ventral to the trachea
  32. The opening for the tongue in the oral cavity is called the
    lingual foramen
  33. The forked appearance of the tongue is used to
    lateralize the location of objects
  34. The glottis is the opening to the _______ ______.
    laryngeal mound
  35. Some snakes have an enlarged epiglottis which does what?
    helps produce a hissing sound
  36. When the mouth is closed, the laryngeal mound fits into the _____ _____ in the roof of the mouth which is the internal opening of the ______ ______.
    choanal slit, nasal cavity
  37. These veins can be used for venipuncture during surgery and typically the (right/left) is the biggest.
    Palatine veins, right
  38. The esophagus is located (dorsal/ventral) to the trachea.
  39. True/False, the esophagus is composed of smooth muscle
    False, it is amuscular
  40. What does the small intestine look like?
    short & coiled
  41. This family of snakes has a cecum
  42. The most cranial part of the cloaca that receives fecal waste
  43. The middle part of the cloaca that receives reproductive secretions and urinary waste
  44. The caudal part of the cloaca that acts as a reservoir
  45. All three of these are found caudal to the liver
    • pancreas
    • spleen
    • gall bladder
  46. Some species might have a combined spleen and pancreas called the
  47. Describe the rings of the trachea
    incomplete cartilaginous rings which are solid ventrally
  48. Is the right lung bigger or smaller than the left lung
  49. This part of the lung is involved in gas exchange
    cranial part
  50. This part of the lung is only an air sac and is not involved in gas exchange
    caudal part
  51. Where are the lungs attached?
    dorsally, to the ribs
  52. What is different about the lungs in aquatic species of snakes?
    The caudal portion of the lung may extend as far as the cloaca and function as a gas bladder for buoyancy
  53. Deoxygenated blood from the (left/right) part of the ventricle enters the ________ and ________.
    right, left systemic/aortic arch and pulmonary trunk
  54. Oxygenated blood from the (right/left) part of the ventricle will enter the ________ which will give rise to the left and right _______ ______.
    left, right systemic/aortic arch, common carotid arteries
  55. The left and right systemic/aortic arches fuse to form the
    dorsal aorta
  56. These veins are located cranial to the heart and near the trachea
  57. This vein is located ventral to the liver
    caudal vena cava
  58. This vein is located dorsal to the liver
    hepatic portal vein
  59. The distal part of the kidney is called the _______ segment and contributes to ______ _____. What animal shares this characteristic?
    • sexual, seminal fluid
    • Lizards
  60. Gas exchange in the cranial lung occurs in what specific location?
  61. What kind of cells line the collecting duct?
    columnar epithelium
Card Set
Snake Anatomy
snake anatomy