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Comparison of Human and Frog Circulatory System

Zoology Presentation
by

Angela Lugtu

on 4 March 2014

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Transcript of Comparison of Human and Frog Circulatory System

Frogs:
Amphibians (who have a secondary mode of respiration) do not have lungs like us, but they have a different type of lung called faveolar (faviform) which is a specific lung but has a less defined lung system and are all found on the lung sac.


COMPARISONS AND DIFFERENCES OF HUMAN AND FROG CIRCULATORY SYSTEM
The lungs are long and slender but only the anterior portion participates in gas exchange. The posterior section is called a saccular portion and acts as a bellow to help move air in and out.
Amphibian diving frogs have a sphincter at the base of the pulmonary trunk that contracts so they do not waste sending blood flow to the lungs so they do not waste oxygen when they are underwater.
They have a sinus venosus, an anatomically divided atrium, a single un-divided ventricle, and a conus arteriosus with a spiral valve. The undivided ventricle creates the potential to mix oxygen with carbon dioxide, but the heart muscles create channels to prevent this (80% efficient).
Humans:
Just like frogs, humans also have three main parts or classification of circulatory system. The heart, lungs and blood. It helps both humans and frogs to pump blood and oxygen throughout the body.
The trunk branches into right and left pulmonary arteries to the pulmonary blood vessels. The vessels generally accompany the airways and also undergo numerous branchings. Once the gas exchange process is complete in the pulmonary capillaries, blood is returned to the left side of the heart through four pulmonary veins, two from each side.
The pulmonary circulation has a very low resistance, due to the short distance within the lungs, compared to the systemic circulation, and for this reason, all the pressures within the pulmonary blood vessels are normally low as compared to the pressure of the systemic circulation loop.
Differences
Frog has only one ventricle while the human has two.
Frogs only have one vessel leading to the heart while humans have two Vena Cavas
COMPARISONS
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