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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

who excretes ammonia?

Larval amphibians