Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
12 Cards in this Set
- Front
- Back
what are the components of a true circulatory system in animals?
|
muscular pump = heart
fluid=blood conduits=blood vessels |
|
how do plants circulate without a heart
|
capillary action
|
|
which animals dont have a "true" circulatory system
|
sponges, jellyfish, flatworms
|
|
describe an open circulatory system
|
heart pumps to move internal fluids around body cavity more rapidly; open ended vessels
|
|
describe a close circulatory system
|
blood contained in closed tubes, recirculated
|
|
extracellular fluid consists of blood plasma and interstitial fluid; describe these
|
plasma: fluid portion of circulatory system
interstitial: fluid that bathes and surrounds cells |
|
what is fluid of open circ. sys
|
extracellular fluid
|
|
advantages of closed circ sys
|
-blood can be directed to specific tissues
-blood volumes reduced -leaning of blood by kidneys -faster transport |
|
-arteries
-venules -capillaries |
-branch into arterioles that feed capillary beds
-drain capillary beds and form veins -sites of gas/nutrient exchange |
|
what is blood pressure?
|
force exerted by blood against the walls of vessel
|
|
how does fish circ sys work
-how many heart chambers |
heart - gills - body - heart
-two chambered heart - blood pumped to body under low pressure |
|
how BP compared between systemic and pulmonary circuit in 4 chambered heart
|
pulmonary = low
systemic = high |