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→Meaning
===Meaning===
[[File:Blood.png|right|300px|thumb|A magnified image of blood going through a capillary.]]
A '''red blood cell''' is a [[Specialised Cell|specialised cell]] which carries [[oxygen]] around the body.
===Adaptations of Red Blood Cells===
: '''Red blood cells''' are shaped to fit through [[capillary|capillaries]] without getting stuck.
===About Red Blood Cells===
: [[Blood]] is a [[tissue]] made of [[Blood Plasma (Biology)|plasma]], [[White Blood Cell|white blood cells]] and '''red blood cells'''.
: '''Red blood cells''' are specially [[Adaptation|adapted]] to transfer [[oxygen]] around the body.
==Key Stage 4==
===Meaning===
[[File:Blood.png|right|300px|thumb|A magnified image of blood going through a capillary.]]
A '''red blood cell''' is a [[Specialised Animal Cell|specialised animal cell]] used to transport [[oxygen]] around the body.
===Adaptations of Red Blood Cells===
: '''Red blood cells''' have a [[biconcave]] shape which maximises their [[Surface Area|surface area]] to allow [[oxygen]] to be [[Absorb (Biology)|absorbed]] quickly.
: '''Red blood cells''' have a smooth rounded edge to pass through the [[capillaries]] without getting stuck.
: '''Red blood cells''' have a large number of [[haemoglobin]] [[molecule]]s used to transport [[oxygen]].
===About Red Blood Cells===
: '''Red blood cells''' make up about 45% of the [[blood]].
: '''Red blood cells''' carry [[oxygen]] in their [[haemoglobin]] [[molecule]]s.
: '''Red blood cells''' are made in the [[Bone Marrow|bone marrow]].
: When '''red blood cells''' die they are broken into small pieces called [[plateletsplatelet]] s which help the [[blood]] clot when there is an open wound.
: If a person suffers from [[Sickle Cell Anemia]] the '''red blood cells''' are sickle shaped so they can become stuck in [[capillaries]].
{| class="wikitable"
|-
|[[File:BloodConstituents.png|center|300px]]
|-
| style="height:20px; width:200px; text-align:center;" |A [[diagram]] showing the [[percentage]]s of the different parts that make up [[blood]].
|}
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/0008158754/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158754&linkCode=as2&tag=nrjc-21&linkId=27ad53b0283feeff7fc5ae04a9e205f473 ''Red blood cell, pages 86, 89, 107, 116-7, 118, 149, 253, GCSE Biology; Student Book, Collins, AQA '']
:[https://www.amazon.co.uk/gp/product/1782945598/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945598&linkCode=as2&tag=nrjc-21&linkId=ad276ad49df77ab4b40ab4fd0fe10234 ''Red blood cells, page 32, GCSE Combined Science; The Revision Guide, CGP, AQA '']
:[https://www.amazon.co.uk/gp/product/1782945563/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945563&linkCode=as2&tag=nrjc-21&linkId=9a1d023a374038e6072f33c4f3cf808b ''Red blood cells, page 36, GCSE Biology; The Revision Guide, CGP, AQA '']
:[https://www.amazon.co.uk/gp/product/1782946381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946381&linkCode=as2&tag=nrjc-21&linkId=5ec5fc3f6429e30c1d9ab9bca2bccf93 ''Red blood cells, page 80, GCSE Combined Science Trilogy; Biology, CGP, AQA '']
:[https://www.amazon.co.uk/gp/product/1782945954/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945954&linkCode=as2&tag=nrjc-21&linkId=100574c08fbbb64318256eb79ed61a76 ''Red blood cells, page 86, GCSE Biology, CGP, AQA '']
:[https://www.amazon.co.uk/gp/product/1471851338/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851338&linkCode=as2&tag=nrjc-21&linkId=425855d5890466e47189e1c21b67a1ea ''Red blood cells, pages 34, 55, GCSE Biology, Hodder, AQA '']
:[https://www.amazon.co.uk/gp/product/0198359373/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359373&linkCode=as2&tag=nrjc-21&linkId=952a73bbb09d222ecc4b50d200679849 ''Red blood cells, pages 52, 61, GCSE Biology; Third Edition, Oxford University Press, AQA '']
:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Red blood cells, pages 54-5, GCSE Combined Science Trilogy 1, Hodder, AQA '']
====Edexcel====
:[https://www.amazon.co.uk/gp/product/1292120215/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120215&linkCode=as2&tag=nrjc-21&linkId=8f96ddb76196848bafdb124354e4cf77 ''Red blood cells (erythrocytes), page 157, GCSE Chemistry, Pearson, Edexcel '']
:[https://www.amazon.co.uk/gp/product/1292120207/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120207&linkCode=as2&tag=nrjc-21&linkId=22455ff53961978667722edaa64c0be5 ''Red blood cells (erythrocytes), page 167, GCSE Biology, Pearson, Edexcel '']
:[https://www.amazon.co.uk/gp/product/1782948120/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948120&linkCode=as2&tag=nrjc-21&linkId=dedef775c6a43dbb0a609441525adac0 ''Red blood cells, page 262, GCSE Biology, CGP, Edexcel '']
:[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Red blood cells, page 61, GCSE Combined Science; The Revision Guide, CGP, Edexcel '']
:[https://www.amazon.co.uk/gp/product/1782946748/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946748&linkCode=as2&tag=nrjc-21&linkId=a4f0348fc37d0ba1bb52d27f8679581f ''Red blood cells, page 89, GCSE Biology; The Revision Guide, CGP, Edexcel '']
====OCR====
:[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Red blood cells, page 31, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']
:[https://www.amazon.co.uk/gp/product/1782945660/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945660&linkCode=as2&tag=nrjc-21&linkId=83aa4500ad7759e7f401a1c5ba5df758 ''Red blood cells, page 38, Gateway GCSE Biology; The Revision Guide, CGP, OCR '']
:[https://www.amazon.co.uk/gp/product/0198359810/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359810&linkCode=as2&tag=nrjc-21&linkId=d768d99f1a06f7c12fab40e5aef85a55 ''Red blood cells, pages 28, 31, 61, 67-68, 77, Gateway GCSE Biology, Oxford, OCR '']