|
Characteristic of open circulatory system I. Blood flows in the open tissue space, the sinuses II. Blood is in direct contact with the tissues cells III. Blood flow is slow IV. Blood pressure is high Choose the option with characteristics |
|||||||
|
a) |
All except II |
b) |
All except I |
c) |
All except III |
d) |
All except IV |
|
Characteristic of open circulatory system I. Blood flows in the open tissue space, the sinuses II. Blood is in direct contact with the tissues cells III. Blood flow is slow IV. Blood pressure is high Choose the option with characteristics |
|||||||
|
a) |
All except II |
b) |
All except I |
c) |
All except III |
d) |
All except IV |
(d)
All except IV.
In open circulatory system instead of capillaries, blood vessels join directly with the open sinuses. Blood is actually a combination of blood and interstitial fluid called haemolymph which is forced from the blood vessels into the large sinuses, where it actually, baths the internal organs
|
Open Circulatory System |
Closed Circulatory System |
|
Blood flows in the open tissue spaces. Blood is in direct contact with the tissue cells. Exchange of material directly between the blood and tissue cells. Blood flow is slow. Blood has very low pressure. |
Blood flows in the closed tubes. Blood does not come in direct contact with tissue cells. Exchange of material between tissue cells and blood occurs via tissue fluid. Blood flow is rapid. Blood pressure is high. |