class amphibia Flashcards
1
Q
what does the term amphibian mean
A
two life styles:
- larval/juvenile stages in water
- adult life on land
2
Q
what do they do to lay eggs/mate
A
return to the water
3
Q
features not seen in bony fish
A
- limbs
- tongue
- eyelids
- ears: tympanic membrane
- larynx
- larger brain
- mucous glands
4
Q
what is the tongue used for
A
catching prey, sensory input
5
Q
what are their limbs made of
A
girdles of bone
6
Q
what are the eyelids for
A
keeping eyes moist
7
Q
what does their smooth skin help with
A
- osmotic balance
- respiration
8
Q
what do they use for gas exchange
A
lungs, moist skin, gills (larva)
9
Q
what kind of circulatory system
A
closed, double loop
- 3 chambered heart: 2 upper atria, 1 ventricle
- mixed blood
10
Q
how do they reproduce
A
- in the water, eggs covered in jelly released
- external fertilization
- larva go through metamorphosis
11
Q
how do they regulate body temp
A
ectothermic: rely on external temp
