Flashcards in Reptiles Deck (53)
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1
Why get away from water?
more efficient heart
2
Why get away from water?
amniotic egg
3
Why get away from water?
better excretory system
4
Now that reptiles are terrestrial they must...
conserve water
5
how do reptiles conserve water?
by producing a special nitrogenous waste - uric acid
6
how is the skin waterproofed?
by keratin which protects them from desecration
7
how do reptiles breathe?
via lungs
8
birds and mammals have completely separate ____ and ____ systems
pulmonary and systemic systems
9
amniotic egg
egg surrounded by extra-embryonic membranes
10
when did the amniotic egg first develop?
carboniferous era
11
characteristics of amniotic egg
leathery or birttle: mechanical support so they don't collapse on land
12
characteristics of amniotic egg
permeable to gases: gas exchange
13
characteristics of amniotic egg
fairly impermeable to water
14
characteristics of amniotic egg
not present in therian mammals
15
why is allontois no longer needed in the mother's womb?
because of the umbilical cord connecting the baby to the mom - mom gets rid of all the waste
16
Consequences of using terrestrial eggs
internal fertilization - sperm cannot penetrate the egg shell
17
Consequences of using terrestrial eggs
non-toxic nitrogen waste product is required (uric acid)
18
What do excretory organs do?
control concentration and composition of extracellular fluids and excrete waste
19
salts and ions are released by the
skin, gills, kidneys, or specilized glands
20
excretory products
salts
21
excretory products
ions
22
excretory products
water
23
excretory products
fecal matter released by digestive system
24
excretory products
nitrogenous wastes
25
what are nitrogenous wastes
product of protein and DNA metabolism
26
excretory organs (kidneys) and skin and gills release
nitrogenous wastes
27
ammonia is very toxic that's why its needs to be ...
diluted and disposed of quickly or converted a less toxic form
28
who excretes ammonia?
ray finned fishes - marine and freshwater
29
who excretes ammonia?
aquatic invertebrates
30
