ch.23 Flashcards
blood flows from two chambered heart through the gills then the rest of the body
single circulation
body undergo deep pressure when goes through lungs, 3 chambered heart
double circulation
blood clotting
platelets
heart attack
myocardial infarction
the heart muscle is relaxed; blood flows into all four chambers of the heart
diastole
the atria contract, pushing blood into the ventricles
atrial systole
the ventricles contract; forcing blood out the heart
ventricular systole
both ventricles pump the same volume, but the left ventricles pumps with greater force
cardiac output
plaque/cholesterol that is plugging the blood from going to parts of the heart and leads to to MI;
atherosclerosis
What is the major constituent of atherosclerotic plaque?
cholesterol
Which of the following contribute to, or increase the risk of, heart disease? Choose all that apply.
smoking; sedentary lifestyle; a diet rich in animal products ; diabetes
Where does the signal to initiate a heart beat originate?
SA node
What is the role of the AV node?
to relay a signal for the ventricles to contract
What is the role of red blood cells?
to carry oxygen to all the parts of the body
What do we call the non-cellular fraction of blood?
plasma
What is the main function of the circulatory system?
to distribute nutrients and collect waste throughout the body
What is the most common cause of death in the US?
cardiovascular disease
In a ___ circulatory system, fluid leaves the vessels and bathes the tissue, while in a ___ circulatory system, fluid is confined to vessels and nutrients and waste are exchanged with body fluids.
open ; closed
What kinds of animals have open circulatory systems?
arthropods and most mollusks
Which are chambers of the human heart?
right atrium
left ventricle
right ventricle
left atrium
