Purpose:
To learn the parts and functions of the organs of the
respiratory and circulatory systems. To identify the
organs on the frog. To compare the respiratory and circulatory
systems of the frog with the human.
Data:
Respiratory
System: The respiratory system consists of
the nostrils(nares), the glottis, and
the bronchi which open into two lungs, hollow
sacs with thin walls. The walls of the lungs are filled
with capillaries, which are microscopic blood
vessels through which materials pass into and out of
the blood. Label each part on your diagram.
Use the Dissection
Works computer program to identify each structure
in the diagram below.
Circulatory
System: The circulatory system consists of
the heart, blood vessels, and blood.
The heart has two receiving chambers, or atria, and
one sending chamber, or ventricle. Blood is carried
to the heart in vessels called veins. Veins
from different parts of the body enter the right and
left atria. Blood from both atria goes into the ventricle
and then is pumped into the arteries, which are
blood vessels that carry blood away from the heart.
The heart is contained in a protective sac called the
pericardium.
Refer to the
diagram below to identify the parts of the circulatory
and respiratory systems that are in the chest cavity.
Find the left atrium, right atrium, and ventricle
of the heart. Also, on the heart find the major blood
vessels that carry blood from the heart to the body. These
blood vessels include the conus arteriosus and
the pair of arteries that branch off the conus arteriosus
called the truncus arteriosus. Find an artery
attached to the heart and another artery near the backbone.
Find a vein near one of the shoulders. Label these
parts on your diagram.
Use the Dissection
Works computer program to identify each structure
in the diagram below.
Click
here for copy of human respiratory and circulatory system
to label.
Carefully disect out the heart. You will
cut the heart in half using a frontal section. This will
allow you to see the three chambers of the heart. Use
the diagram below to help you identify the parts of the
frog heart.
Click
here to compare the human heart.
Data Table: Functions
|
System
|
Organ
|
Function
|
|
Respiratory
System
|
Nares
|
|
|
Glottis
|
|
|
Bronchi
|
|
|
Lungs
|
|
|
Circulatory
System
|
Atria (Left and Right)
|
|
|
Ventricle
|
|
|
Conus Arteriosus
|
|
|
Truncus Arteriosus
|
|
|
Aorta
|
|
| Posterior Vena Cava |
|
|
Pericardium
|
|
Analysis Questions:
- How does a frog take air into its lungs? What other
methods does a frog use to take in oxygen? How have
these adaptations helped the frog live part of its
life in water and part of its life on land?
- Describe the route blood takes through the chambers
of the frog's heart.
- How are the respiratory and circulatory systems
inter-related?
Conclusion:
What did you learn about the respiratory and circulatory
systems? How do the frog and human systems compare? What
structures and functions are similar? Different?
