Blood ppt

19
Blood Blood Fluid that circulates through the heart, arteries, capillaries, and veins; chief means of transport within the body

description

it contains the details about the blood components and its types

Transcript of Blood ppt

BloodBlood Fluid that circulates through the

heart, arteries, capillaries, and veins;

chief means of transport within the body

the average human has 5 litres of blood

it is a transporting fluid

it carries vital substances to all parts of the body

BloodBlood

COMPONENTS OF BLOOD

Blood Is Composed Of Two Parts 1.Plasma 2.Cellular Components -RBC -WBC -Platelets

plasmaplasma

The blood consists of a suspension of special cells in a liquid called plasma. In an adult man, the blood is about 1/12th of the body weight and this corresponds to 5-6 litres. Blood consists of 55 % plasma, and 45 % by cells called formed elements.

Cells in Blood

•Erythrocytes (Red blood cells)

•Leukocytes (White blood cells)

•Thrombocytes (Platelets)

Erythrocytes

• 7.5 micron diameter

• No nucleus or organelles;

lots of hemoglobin

• Biconcave disc

• large surface to volume

ratio: efficient gas

exchange

• The erythrocytes are the most numerous blood cells i.e. about 4-6 millions/mm3.

• They are also called red cells. In man and in all mammals, erythrocytes are devoid of a nucleus and have the shape of a biconcave lens. In the other vertebrates (e.g. fishes, amphibians, reptilians and birds), they have a nucleus.

• The red cells are rich in hemoglobin, a protein able to bind in a faint manner to oxygen. Hence, these cells are responsible for providing oxygen to tissues.

the bodies “defence” part of the immune

system much larger than RBCs have a nucleus 4000-13000 per mm3

White blood cellsLeukocytes

• Granulocytes

Neutrophils

Eosinophils

Basophils

•Agranulocytes

Lymphocytes

Monocytes

GranulocytesGranulocytes neutrophils neutrophils

260 - 70% of circulating leukocytes

• Nucleus: 2-5 lobes ,dia –12-15 micro meter

•Have horshoe shoe shaped or band shaped nucleus called as band cells

• cytoplasm is transparent and its granules are pink coloured

Eosinophills

• 2-4% of circulating leukocytes

• Bilobed nucleus

•defense against parasites; modulation of inflammatory processes

• eosinophilic specific granules containing:

• major basic protein (toxic to parasitic larvae),

• lysosomal enzymes, peroxidase, histaminase

BasophillsBasophills

• < 1 % of circulating leukocytes

• Nucleus irregular lobes

•Dia-9-10 micro meter

Agranulocytes

Lymphocytes

• ~30 % of circulating leukocytes

• Round, densely stained nucleus; little cytoplasm

•Dia-8-10 micro meter

monocytes

• 5 % of circulating leukocytes

• indented folded nucleus

Fig. 12-18

•Opaque, slightly basophilic cytoplasm;

•fine azurophilic granules

•Dia-8-10 micro meter

Thrombocytes(platelets)

• They are small sized diskettes about 3 micro meter in diameter

• Cell Fragments produced of megakaryocytes

• no nucleus• Numerous cytoplasmic organelles• promote blood clotting, help

repair gaps in blood vessel walls