Download Misconceptions relating to the Circulatory system

Misconceptions relating to the Circulatory system
Air is distributed through the body in air tubes
Molecules from food are distributed by way of special tubes, not by way of the
circulatory system to the rest of the body.
• Blood does not carry simple sugars molecules to the cells of the body
• Blood flows freely through the walls of blood vessels
• Capillaries are found only in internal organs, such as the lungs and intestines
• Anything can pass through the walls of the capillaries
• Students may not be aware of the composition of blood and may think that it is just red
water that flows through our bodies without a purpose
• Plasma is the red liquid that is found in blood
• Plasma contains dissolved materials such as all nutrients, gases, urea and hormones
• There are only two proteins in plasma
• Red blood cells do not have a nucleus, which means the cell is dead. The biconcave
shape means that it can hold more haemoglobin
• Clotting proteins found in plasma are the only things that are used to clot blood
• Blood on the left side of the heart goes to the left side of the body and blood in the
right side of the heart goes to the right side of body
•• Exercise counteracts a bad diets and abuse of substances allowing heart to remain
healthy
• Low blood rate in the capillaries is caused by the high resistance to blood flow created
by the very narrow diameter of the capillaries
• The blood pressure in the glomerular capillaries is even higher than that of the afferent
arteriole
• The shape of the red blood cells allows them to hold more haemoglobin
• The shape of the red blood cells allows them to be in close contact with body cells
• Low blood velocity in capillaries is due to their small diameter
• Low blood velocity in capillaries is due to material exchange through capillaries
• Low blood velocity in capillaries is due to their long distance from the heart
• When environmental temperature increases, skin takes a red appearance because the
velocity of the blood increases
• When environmental temperature increases, skin takes a red appearance because the
diameter of the capillaries increases
• When environmental temperature increases, skin takes a red appearance because blood
pressure increases
• Blood from the left and right halves of the heart goes to all parts of the body
• Blood from one side of the heart goes to the right side of the body. Blood from the
other side goes to the left side of the body
• Blood goes into the heart on one side. Blood leaves the other side and goes to all parts
of the body
• The blood in your veins is blue
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