The Blood

eimearkelly3
Flashcards by eimearkelly3, updated more than 1 year ago
eimearkelly3
Created by eimearkelly3 over 7 years ago
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Leaving Certificate Biology (The Blood) Flashcards on The Blood, created by eimearkelly3 on 09/09/2013.

Resource summary

Question Answer
Function of the vascular system To transport substances around the body
The 2 vascular systems in the body Circulatory system Lymphatic system
Plasma Pale, yellow liquid that comprises about 55% of the blood
Plasma is made of 90% water 7% proteins 3% dissolved materials which are being transported e.g. amino acids, vitamins, minerals and waste products such as urea and CO2.
Main plasma proteins Clotting proteins Antibodies
Clotting proteins Form blood clots (are too large to pass through the walls of the blood vessel)
Role/function of plasma To transport dissolved materials e.g. glucose, amino acids, salts, carbon dioxide, vitamins, minerals, urea, and hormones. Also carries heat
Serum Plasma from which the clotting proteins have been removed. Contains other plasma soluble materials including antibodies. Often used in injections to give someone resistance to a disease.
Functions of the blood system Transport Temperature regulation (altering blood flow through the skin) Immunity (protection against pathogens) Communication (hormones)
Red blood cells or erythrocytes (living/organic) are produced in The bone marrow of bones such as the ribs, breat bone, long bones in the arms and legs, and the vertebrae of the backbone
Shape of erythrocytes Small, biconcave, disc-shaped cells (greater surface area for the uptake and release of oxygen)
Nucleus/no nucleus in red blood cells No nucleus (more space for haemoglobin) therefore more oxygen can be carried
Mitochondria / no mitochondria No mitochondria so that the oxygen being transported is not used up in respiration
Function of haemoglobin To carry oxygen
How many oxygens bind with one haemoglobin 4
when oxygen binds to haemoglobin what compound forms oxyhaemoglobin
Hoow long do RBC's survive? approx. 4 months
Hom many RBCs per mm³ approx. 5 million
RBCs are destroyed and recycled by and what happens then? the liver and the spleen (iron is stored in the liver and recycled to make new haemoglobin in the bone marrow) the rest of the RBC and haemoglobin in converted to bile pigments such as biliverdin and bilirubin
RBCs:WBCs 700:1
Role/function of RBCs Transport oxygen (haemoglobin)
Lack of haemoglobin / red blood cells anaemia
Symptoms of anaemia Pale skin colour Loss of energy
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