The Heart and Circulation Flashcards
What is the circulatary system
the heart pumps blood to the lungs where the blood collects oxygen and returns back to the heart and is pumped back all around the body
what is the circulatory system for a fish
the heart pumps the blood to the gills where they are oxygenated and the blood goes straight form the gills to the organs and the de-oxygenated blood goes back to the heart.
what is one problem with the fishes circulatory system
blood losses lots of pressure passing through the gills before it reaches to the organs which means that the blood travels to the organs slower
what are the steps for a humans double circulatory system
heart sends de-oxygenated blood to the lungs and the lungs oxygenate it
then it gets sent back to the heart where the blood gets pumped out to the organs
the organs send the do oxygenated blood back to the heart and repeat the process
What is the benefit of having a double circulatory system
it can deliver the oxygen that the body needs at a faster rate
State the structure of the heart
the heart has 4 chambers left/right atrium on the top and ventricle at the bottom
there are valves in separating the ventricles and atria
state the 4 vessels that are in the heart
The vena cava brings in deoxygenated blood from the body.
The blood passes from the heart to the lungs in the pulmonary artery.
Oxygenated blood passes from the lungs to the heart in the pulmonary vein.
Oxygenated blood is pumped from the heart to the body in the aorta.
what is the order of where blood enters and leaves
First blood enters the left atrium and the right atrium.
The atria now contract and the blood is forced into the ventricles.
The ventricles now contract and force blood out of the heart.
Valves stop the blood from flowing backwards into the atria when the ventricles contract.
why is the left side of the heart thicker then the right side
because it needs more muscle to pump blood all around the body
what is the purpose of the coronary vein
to provide oxygen to the muscle cells of the heart
The oxygen is used in respiration to provide the energy for contraction.
