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Blood

QuestionAnswer
What are the four components of Blood? Plasma, Red blood cells, White blood cells, Platelets
What % of plasma and what % of blood cells and platelets are present in the blood? 55% Plasma, 45% Platelets
What is the role of plasma? Transport
Where are red blood cells produced? Bone marrow of large bones
Describe the shape of red blood cells Biconcave/circular discs
Where are dead red blood cells broken down? Liver and spleen
What is the role of red blood cells? Transport Oxygen
What is the iron containing pigment found in red blood cells called? Haemoglobin
When oxygen moves into the red blood cells it attaches to haemoglobin forming what? Oxyhaemoglobin
What is the role of white blood cells in the body? Fight infection/disease
Leukaemia is a form of cancer. Describe how leukaemia occurs in relation to white blood cells. Cells are produced too rapidly and are immature - unable to protect against disease and cannot clot blood sufficiently.
What is the role of platelets? Clot the blood
What functions do blood clots have? Reduce blood loss, prevent the entry of microorganisms
What is thrombosis? When a vessel wall is damaged, a clot forms and blocks the blood vessel
List the functions of blood Transport of food, waste and hormones, transport of heat, transport of O2, defence against disease.
What are the four main blood groups? A, B, AB, O
Name two types of white blood cell Lymphocytes, Monocytes
What role do lymphocytes have? Make antibodies
What role do monocytes have? Engulf bacteria
Created by: Lisahynes