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Theme 3 animals - Coggle Diagram
Theme 3 animals
cardiovascular systems
main parts
heart
blood vessels
blood
system type
open
most invertebrates
heart(s) that pump blood/hemolymph through a section of artery & smaller vessels
hemolymph
blood + lymphatic system
artery = carries blood away from heart
nutrients + hormones
blood/hemolymph empties into hemocoel
direct contact with tissue
no endothelial lining in vessels or hemocoel
closed
heart(s) pumps blood throughout body in closed vessels
heart
muscular pump that generates pressure to move blood around body
ranges from single chamber (ventricle) to 4
four chambers
2 atria + 2 ventricles
birds & mammals
keeps oxygen poor blood separate from oxygen rich blood
resistance in systemic circuit > pulmonary circuit
work done by left ventricle pumping to systemic is 5-7x greater
left ventricle more muscular
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valves
prevent backflow of blood
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atrioventricular valves (AV)
3 more items...
semilunar valves
2 more items...
cardiac cycle
systole
2 more items...
diastole
2 more items...
both atria contract simultaneously
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ventricle = chamber that pumps blood out of the heart
various forms of 3 chambers
amphibians
2 atria + 1 ventricle
vessels lined with endothelium
even capillaries of mammals
blood never leaves blood vessels
vertebrates & cephalopod molluscs
cardiac rhythm
control of cardiac muscle contraction
requires no input from CNS in all animals
regulated by spontaneous depolarization of specialized cardiac muscle cells in most animals
myogenic pacemakers
signal travel down conducting system
