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LS2:Circulatory System
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A circulatory system consists of:
1.Muscular pump:the heart
2.Fluid:blood
3.Series of conduits:blood vessels
Open circulatory system
1.Found in arthropods and mollusks
Benefits of Closed circulatory
1.fast transport through vessels
2.Blood can be directed to specific tissues
3.Specialized carriers can travel in the vessels and transport hormones
Pulmonary circuit
blood is pumped from the heart to the lungs and back again
systemic circuit
blood travels from the heart to the rest of the body and back to the heart
arteries
carry blood away from the heart
capillaries
the site of exchange between blood and tissue fluid
venules
drain the capillary beds and form veins, which deliver blook back to the heart
Fish hearts have two chambers
1.Atrium:recieves blood from the body
2.Ventricle:recieves pumped blood from the atrium and sends it to the gills
3.Collects in the aorta
4.Distributed throughout the body
The right ventricle
pumps blood through the pulmonary circuit
the left ventricle
pumps blood through the systemic circuit
The right atrium
recieves deoxygenated blood from the body through large veins
Superior vena cava
blood from upper body
inferior vena cava
blood from lower body
Blood flow
1.Right atrium
2.AV valve
3.Right Ventricle
4.Atrium contracts, then ventricle contracts
5.AV valve closes
6.Blood is pumped through the pulmonary artery to the lungs
7.oxgenated blood returns to the left atrium through the pulmonary veins
8.the ventricle fills as bloods enters throuh an AV valve
9.The left atrium contracts, then the ventricle
10. The aortic valve opens and blood circulates through the aorta
systole
when ventricles contract
diastole
when ventricles relax
Author
dante01
ID
158563
Card Set
LS2:Circulatory System
Description
study
Updated
2012-06-13T11:57:46Z
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