Main Structure And Function Of Red Blood Cells
RED BLOOD CELL- Red Blood Cells Erythrocytes
- RBC is also called erythrocytes.
- There is a presence of pigment called haemoglobin which is also known as respiratory pigment because the pigment carry oxygen to different organs.(pigment gives colour to blood ) .
- The shape of RBC is Biconcave disc shaped.
- RBC has no nucleus present , in case of human( mammals).
- The size of RBC are very small
- The both vitamin B12 and folic acid are necessary for the development of RBCs.
FUNCTION OF Red Blood Cells
- The most important function of Red Blood Cells is to transfer O2 and CO2 for transportation.
- RBC contain enzyme called carbonic anhydrase which maintain the pH
- RBC maintain the blood pH or acid -base balance.
- RBC are produced from Bone Marrow in case of adults.
- In case of embryo they are not directly produced.
- It is basically formed from different organs of body like liver , spleen and bone marrow .
- It is semisolid substance present in long hollow bone.
- There are two types of bone marrow:-
1) Yellow bone marrow which is fatty tissue .
2)Red bone marrow from when the cell of blood is developed.
RBC don’t have intracellular machinery which control cell growth and repair .
Life span of RBC is 120 days.
When RBC is released in blood it remains in it for 120 days and are destroyed in spleen.
ANEMIA :If Haemoglobin decreases ,it leads to the decrease in RBC which further leads to Anemia (lack of RBC )
POLYCYTHEMIA :The condition when erythrocytes count is increase in haemoglobin .
THROMBOPOIESIS : Development of platelets .
- When we keep blood in a vessel the blood will form a pile like structure . The formation of such structure is called ROULEAUX FORMATION.
- When we keep the fluid in a tube the higher density one will be the settle down first . Similarly RBC will be the first one to settle because it have higher density due to the presence of iron and other minerals . Thus leading to the formation of pile like structure known a ROULEAUX FORMATION.
ERYTHROCYTE SEDIMENTATION RATE ( SED RATE )
- Sed rate or erythrocyte sedimentation rate (ESR) is the blood test that can reveal inflammatory activity .
- The rate at which red blood cells sediment in a period of one hour and form pile structure .
- For male : the value of ESR should be 3-5 mm/hr.
- For female :the value of ESR should be 4-7 mm/hr.
- The Basal ESR is slightly higher in females. If any change in tissue indicated inflammation or any disorder.