circulatory systems Flashcards
1
Q
describe open circulatory system
A
blood can diffuse out of vessels e.g. insects
2
Q
describe closed circulatory system
A
blood confined to vessels e.g. fish, mammals
3
Q
describe single circulatory system
A
blood passes through heart once per circuit of the body
4
Q
describe double circulatory system
A
blood passes through heart twice per circuit of the body
