Instructions: Fill in the missing words by listening to or watching the Youtube clip - https://www.youtube.com/watch?v=co6iuDpaQTM&t=39s&ab_channel=FuseSchool-GlobalEducation
What is __blodd____?
Blood is always red, right? Wrong. Blood comes in a variety of colours. It may be __red____ in
humans and in other ___mammals___, but an octopus, for example, has blue blood and oscillated
ice fish have blood that is completely clear ... and in Papua New Guinea there are green-
blooded skink - with green __blooded____. So don't be fooled into thinking blood is always red.
We are going to discover what blood is made of and the roles of the different components.
Blood consists of red blood cells, white blood cells, platelets and plasma.
Fifty five percent of our blood is this pale yellow sticky liquid called plasma. Plasma is
mainly made up of water and proteins. It __carries___ nutrients, hormones and proteins around
the body and it also distributes heat around the body, so it is pretty important.
However, this is not the part that makes blood red, green, blue or clear. ___plasma___ equals
about 92% water and just under 8% _plasma_____.
About 45% of our blood is made up of red blood cells. Red blood cells are ___tiny___ bi-concave,
disc-shaped cells known as erythrocytes. They are made in the bone marrow and contain
a special iron-containing protein called haemoglobin.
____haemoglobin___ is what enables our red blood cells to carry oxygen around the body and it is
haemoglobin that makes our blood red. blood cells___octupus___ have a different special protein called
haemocyanin which makes their __blood____ blue. The ice fish doesn't have either haemoglobin
or ___haemocyanin___ which is why the blood runs clear.
____white___ blood cells and platelets make up less than 1% of our blood. White blood cells are
warriors. They protect our body against invasion from disease-causing organisms known
as __pathogens____. These clever little cells do this in two ways.
____70___ percent of our white blood cells are phagocytes and engulf foreign pathogens in
a process known as phagocytosis...or the others are lymphocytes which produce
____antibodies___. Antibodies bind to the foreign pathogen and stop it from invading further.
You will learn more about white _blood_____ cells when learning about __disease____ and how our body
defends itself against pathogens.
Now....finally __platelets____. Platelets make a tiny fraction of our blood. They help the blood to
_____clot__when you cut yourself, stopping the bleeding and preventing the __wound____ from
becoming infected.
You should now know that blood isn't necessarily __red____, and the colour depends on what the
blood cells are made up of. Blood consists of nutrients, heat transporting plasma, and the oxygen carrying red blood cells. Less than 1% is made up of very important pathogen-fighting white blood cells. Lastly, blood has clotting platelets.
Answer these questions in your own words:
What makes human blood red? A protein called hemoglobin makes the blood red
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What is our blood made up of? (use percentages as well)
___________________________________________________________%55 is plasma 45% is red blood cells less than 1% white blood/platelets_____________________________
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What stops you bleeding out when you cut yourself or have an injury?
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__platlets in your blood help your blood to clot.______________________________________________________________________________________
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What does blood have to do with fighting off diseases?
_____________________________White blood cells cover the wound.___________________________________________________________
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Explain what plasma is.
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_____plasma is made up of water and protein.___________________________________________________________________________________
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What is a red blood cell? What does it do? What does it look like? What is it made of?
_blood cells are made of cells. It helps us live. It looks like water but red.
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What other animals (or types of animals) have red blood?
All of the animals have blood such as mammals and reptiles but they have cold blood because they lay eggs. The names of some of the animals are lions,lizards and tigers. ___________________________________________________________________
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