Amphibian Gas Exchange Notes

Study this information for the test

1. Amphibian Gas ExchangeAmphibian Gas Exchange
By Mr. “Short day” ChapmanBy Mr. “Short day” Chapman

2. Before we get started:Before we get started:
Habitat Types: (Fossorial, arboreal, Habitat Types: (Fossorial, arboreal,
terrestrial, aquatic)terrestrial, aquatic)
1. Fossorial – lives underground1. Fossorial – lives underground
2. Arboreal – lives in trees2. Arboreal – lives in trees
3. Terrestrial – lives on land3. Terrestrial – lives on land
4. Aquatic – lives in water4. Aquatic – lives in water

7. Think about this?Think about this?
One of the ways One of the ways
that amphibians that amphibians
have adapted to have adapted to
their “less than their “less than
perfect” circulatory perfect” circulatory
system is…..system is…..
They have more They have more
than one surface than one surface
for gas exchange.for gas exchange.

8. RespirationRespiration
Amphibians exchange gases across Amphibians exchange gases across
four surfaces.four surfaces.

9. RespirationRespiration
1.1.GillsGills – the gill arches may be – the gill arches may be
inside or outside the animal’s inside or outside the animal’s
head.head.

10. RespirationRespiration
2.2.LungsLungs – not all amphibians – not all amphibians
have them. have them.
Those of frogs are complex.Those of frogs are complex.
Salamanders and Caecilians have Salamanders and Caecilians have
simple lungs.simple lungs.

12. RespirationRespiration
3. 3. Buccopharyngeal RespirationBuccopharyngeal Respiration
– through the lining of the mouth – through the lining of the mouth
& throat. The throat of all & throat. The throat of all
amphibians has many amphibians has many blood blood
vessels. vessels.
Gases can diffuse into or out of Gases can diffuse into or out of
those blood vessels with relative those blood vessels with relative
efficiency.efficiency.

14. RespirationRespiration
4. Cutaneous (Dermal) Respiration – 4. Cutaneous (Dermal) Respiration –
the exchange of gases across the the exchange of gases across the
surface of the skin. surface of the skin.
In order for this to take place, the In order for this to take place, the
skin must remain moist.skin must remain moist.

17. Convergent Convergent
EvolutionEvolution - is the - is the
process whereby process whereby
organisms not closely organisms not closely
related evolve similar related evolve similar
traits as a result of traits as a result of
having to adapt to having to adapt to
similar environments similar environments
or ecological niches. or ecological niches.

18. ORDER LUNGS BUCCOPHARYNGEAL CUTANEOUS GILLS
SALAMANDERS
FROGS & TOADS
CAECILIANS

19. ORDER LUNGS BUCCOPHARYNGEAL CUTANEOUS GILLS
SALAMANDERS Some 100% 100% Some
FROGS & TOADS
CAECILIANS

20. ORDER LUNGS BUCCOPHARYNGEAL CUTANEOUS GILLS
SALAMANDERS Some 100% 100% Some
FROGS & TOADS 100% 100% 100% None
CAECILIANS

21. ORDER LUNGS BUCCOPHARYNGEAL CUTANEOUS GILLS
SALAMANDERS Some 100% 100% Some
FROGS & TOADS 100% 100% 100% None
CAECILIANS Some 100% 100% None

22. ActivityActivity
An organism is considered to be An organism is considered to be
_______ when active at night._______ when active at night.
NocturnalNocturnal
An organism is considered to be An organism is considered to be
_______ when active during the day._______ when active during the day.
DiurnalDiurnal