Biology Questions and Answers
circulation). In fishes the circulatory
system is simple and complete.
- How many heart chambers
does the amphibian heart
have?
The amphibian heart has three heart
chambers: two atria and one ventricle.
- Why can the amphibian
circulation be classified as
double and incomplete?
The amphibian circulation is dbecause it is composed of systemicouble and (^)
pulmonary circulations: respectively,
heart-tissues-heart. Since amphibians havheart and heart-lue only onengs-
ventricle in the heart, venous blood
taken from the tissuesblood coming from the and arteriallungs are mixed (^)
in the ventricle that then pumps the
mixturpulmonary circulations.e back to the systemic The amphibian and to th e
circulation is classified as incomplete
because in the circuit.venous and arterial blood mix
The blood oxygenation ioccurs also in the systemicn amphibians circulation (^)
since their skin organ. is a gas exchange
- What is the difference
between the amphibian heart
and the reptile heart?
The reptiles have double and incompletecirculation too, (two atria and one ventricle).three heart cham The reptilebers (^)
heart however presents the beginning of
a ventricular seseparates a right and left region of theptation that partially (^)
chamber. With the partial ventricular
septation thvenous blood in the reptile heart is lesse mixture of arterial with (^)
than in amphibians.
- How many chambers do
the bird heart and the
mammalian heart have?
Concerning temperature
maintenance what is the
advantage of the double and
complete circulation of these
animals?
The bird and the mammalian hearts are
divided into four chamatrium, right ventricle, lebers: rift atrium anght (^) d
left ventricle.
Birds ai.e., they nd mammals arcontrol their bodye homeothermic,
temperatuand the double circulationre. The four-cham provide thebered heart
supply of more oxygenated blood to the
tissues makinmetabolic rate (mainly g possible a highercellular
respiration rate). Part of the energy
produced by the cellular rused to maintain the body temperature.espiration is
http://www.biology-questions-and-answers.com