20 terms

Circulatory System

by E. Hung 2014
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Heart
the muscular organ that pumps blood around the body
Arteries
blood vessels, leave heart, carry oxygenated blood, blood is forced through by heart pressure
Veins
blood vessels, go to heart, carry deoxygenated blood, blood is forced through by muscular contractions
Capillaries
thinnest blood vessels found everywhere in the body.
Pulmonary Artery
carries deoxygenated blood from heart to lungs
Pulmonary Vein
carries oxygenated blood from lungs to heart
Coronary artery
the main artery that supplies blood to the heart; blockage will cause heart attack.
Vena Cava
large veins that bring deoxygenated blood from the body to the heart.
Aorta
the largest artery in the body, carrying oxygenated blood from the heart to the body.
Valves
Structures found in large arteries and all veins to prevent the back flow of blood.
White blood cells
Colourless cells in blood, responsible of killing germs.
Red blood cells
Red coloured cell consisting of haemoglobin, responsible for carrying oxygen to body cells.
Blood platelets
Cell fragments that is responsible for blood clotting.
Plasma
55% of liquid in blood, yellowish in colour, carrying nutrients, hormones and metabolic wastes.
Ventricles
Chambers in the heart that squeeze blood out of the heart.
Auricles
Chambers in the heart that squeeze blood into the ventricles of the heart - same as atria.
Haemoglobin
The red pigment found in red blood cell,
Septum
The partition between the left and right sides of the heart.
Valve tendons
The thread-like structures in the heart that hold the valves in place - heart strings.
Heart valves
The large valves in between the ventricle and auricle to allow blood flow in one direction.