Transcript Amphibians - Merrillville Community School

Amphibians
Objective of the Day
• Compare and contrast the fish’s
structure, circulatory system, and
respiratory system to the
amphibian’s structure, circulatory
system, and respiratory system.
Characteristics of Amphibians
• Tetrapod Vertebrate
•
•
•
- (Are fish Vertebrates?)
-(What phylum are amphibians in?)
Can live in both terrestrial and aquatic environments.
- (Can the fish live in both aquatic and terrestrial
environments?)
Spend the most of their larvae stage in aquatic
environment and most of their adult stage in terrestrial
environment.
Skin is moist and is used to exchange oxygen for carbon
dioxide.
- (Key reason why that terrestrial adult amphibians stay
close to places with water)
Life Cycle of a Frog
• https://www.youtube.com/watch?v=AMs3waaW75g
Tail Structure of Amphibians
• In the larvae stage of a frog, they have a
tail.
• As the frog grows into an adult, the tail
disappears because it get digested by
lysosome.
Respiratory System of Amphibians
• In larvae stage, gas
•
•
exchange takes place in
the skin and the gills.
As the amphibians
becomes adults, lungs
are developed and takes
over the gills.
The lungs are derived
from the air bladder of
the bony fish.
-(What is the air bladder
used for in fish?)
Respiratory System of Amphibians
• Amphibians are cold blooded animals
which means that they used less oxygen
compared to warm blooded animals.
• Amphibians has a pulmocutaneous circuit.
- (What was the name for the fish circuit?)
• Amphibians have two types of respiration
called the pulmonary respiration and
cutaneous respiration.
Pulmonary Respiration
• Gas exchange takes place in the lungs.
- (Do you think the frog is still in the
larvae stage or adult stage?)
- (Where does the fish gas exchange takes
place?)
• In the gas exchange, oxygen are diffused
in and carbon dioxide are diffused out.
Cutaneous Respiration
• Respiration through the skin
•
•
- (Remember that amphibians can used both the
skin and the lungs as respiration)
The skin uses water capillaries for the gas
exchange
In the gas exchange, oxygen are diffused in and
carbon dioxide are diffused out.
- (Was this the same as the pulmonary
respiration?)
Amphibians Respiratory Structure
• Amphibians breath through their nostrils
and down into their lungs
(Similar to humans)
• They do not have a ribs or diaphragm
(Not similar to humans)
• As a result, amphibians chest do not
expand but instead their throat expand to
intake air from the outside environment
Recap of the Amphibian
Respiratory system
• https://www.youtube.
•
com/watch?v=Nfojq4i
kHH0
Mudpuppy
(Salamander) https://www.youtube.
com/watch?v=HHdbO
K3cHxA
Circulatory System of Amphibians
• Have a three chambered heart
•
•
-(Fish has a ? Chamber(s) heart?)
The three chambers include two atria and one
ventricle.
-(Fish has how many ventricles and how many
atria?)
Have a double circulation arrangement.
- (Did fish have a double circulation
arrangement?)
Circulatory System of Amphibians
Circulatory System Continued
• Amphibians has two atria and atria is the
receiving chambers (AIR)
• Amphibians has one ventricles and
ventricle is the pumping chamber (VIP)
• Arteries- carries oxygenated blood from
heart to body part
• Veins - carries deoxygenated blood from
body parts to heart
Interesting facts about Frogs
• https://www.youtube.com/watch?v=0Bqz
2XcZ_3M