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Period of relaxation of the heart muscle
diastole
Systole causes the ejection of blood into
aorta and pulmonary arteries
Period of contraction of the ventricles of the heart
systole
The heart muscle itself is called
myocardium or cardiac muscle
A substance in red blood cells that combines with and carries oxygen around the body
haemoglobin
the pThe pale yellow liquid that forms 55% of human blood and contains the blood cells
plasma
Thickest of all blood vessels
arteries
Blood vessel with highest pressure
arterie
Blood entering the left atrium is
oxygenated
How are arteries and veins connected?
By a system of capillaries.
Blood flows from the right atrium tot he right ventricle through the
tricuspid valve
Blood returning from the lungs enters the _____ of the heart
Left atrium
The heart chamber that receives blood from the venae cavae is the
right atrium
The ventricles are
lower chambers of the heart that pump blood to lungs and body
Waste materials such as ____ are carried by the circulatory system
CO2
The main role of the circulatory system is to deliver needed materials such as
oxygen and nutrients
The name of the vein that returns blood from the lower body.
Inferior Vena Cava
How does blood get from the heart to the lungs?
Pulmonary Veins
Controls the flow of blood through the heart by opening and closing.
heart valves
On the diagram, what brings blood to the heart from the lungs?
C
What is D on the heart diagram?
Right Atrium
What is F on the heart diagram?
Mitral valve
What is B on the heart diagram?
Aorta
Why does the left ventricle have a thicker wall?
the left ventricle pumps blood for all the parts and tissues of the body and hence, need thicker walls for more work that needs to be done
What does the Vena Cava do?
Returns deoxygenated blood from the body to the right atrium.
What does the red blood cells pickup from the lungs to carry to the rest of the body?
Oxygen
When you get a cut on your finger, what part of the blood helps clot the blood?
Platelets or thrombocytes
What is the liquid portion of the blood called?
Plasma
Systemic circulation is the movement of blood between the heart and
all the other parts of the body and back again.
What separate the heart into two sides?
the septum
Pulmonary circulation is the movement of blood between the heart and the
the lungs, and back.
Which blood vessels are the site of exchange of substances between the blood and the body?
capillaries
Which blood vessels contains valves
veins
Name two blood vessels that leave the heart
Pulmonary artery, Aorta
Name two blood vessels that enter the heart
Superior vena cava and inferior vena cava. Pulmonary veins
The function of capillaries is to
exchange some elements (O2,CO2, nutrients...) between the blood and tissues.
Arteries branch off into tiny blood vessels called
capillaries
Which blood vessels carry blood away from the heart?
arteries
Which blood vessels carry blood back to the heart?
veins
What is the function of red blood cells
Transport oxygen
Heart valves prevent ...
backflow
What is the function of white blood cells
Protecting our body from infections
How many chambers does the heart have?
4
Pulmonary Arteries carry deoxygenated blood from
heart to lungs
Pulmonary veins transport oxygen rich blood from
lungs to heart


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