Organisation- Heart, lungs & Blood Vessels Flashcards
The circulatory system is made of ________, ______, ___________ and the _____.
The circulatory system is made of arteries, veins, capillaries and the heart.
Arteries are specialised with _____ ________ walls and a _____ _____.
Arteries are specialised with thick elastic walls and a small lumen.
_________ _____ are only ___ cell thick, so there is a short distance for diffusion.
Capillary walls are only one cell thick, so there is a short distance for diffusion.
Veins have ______, thin and less _______ walls and a _____ lumen.
Veins have valves, thin and less elastic walls and a large lumen.
The main structure of the heart includes the a____, vena ____, pulmonary a_____,
pulmonary v___, v_____, a____ and v_________.
The main structure of the heart includes the aorta, vena cava, pulmonary artery,
pulmonary vein, valves, atria and ventricles.
_____ ____ is controlled by a group of cells that act as a pacemaker.
Heart rate is controlled by a group of cells that act as a pacemaker.
The pace maker cells are located in the _____ ______.
The pace maker cells are located in the right atrium.
Blood contains r__ _____ cells, w____ _____ cells, p________ and p_____.
Blood contains red blood cells, white blood cells, platelets and plasma.
Red blood cells _____ _______ from the lungs to the ____ _____.
Red blood cells carry oxygen from the lungs to the body cells.
White blood cells _______ _________.
White blood cells destroy pathogens.
Platelets ____ the blood.
Platelets clot the blood.
Plasma is the ______ ____ of the blood which is used to _________ substances.
Plasma is the liquid part of the blood which is used to transport substances.
what type of circulatory system do fish have
a single circulatory system
what type of circulatory system do humans have
a double circulatory system
explain the pathway of the blood in the human circulatory system (what type of blood where does it go etc)
deoxygenated blood is pumped from the heart too the lungs, the blood then becomes oxygenated and gets pumped back to the heart. From here, the oxygenated blood goes to the organs where the blood transfers its oxygen to the body cells. The deoxygenated blood then returns back to the heart.
what is the benefit of a double circulatory system
because the blood passes though the heart twice it means it can travel rapidly to the body cells and give the oxygen the cells need
what is the heart
an organ mainly consisting of muscle tissue. It pumps blood around the body
how many chambers does the heart have
4 - left and right atrium and left and right ventricle
what separates the atrium from the ventricle
valves
what are the 4 main blood vessels that enter and leave the heart.
vena cava, pulmonary vein, pulmonary artery, aorta
what does the vena cave do
brings in deoxygenated blood from the body