Fluid or liquid connective tissue: blood and lymph

Gaurab Karki — Fri, 23 Feb 2018 07:45:38 +0000

1. Blood

It is pale yellow liquid, composed of 90% water and 10% inorganic and organic substances. It contains different proteins(albumin, fibrinogen, globulin), hormones, inorganic salts etc

small,biconcave, non nucleated (fish, amphibian, reptiles,birds, camel;nucleated)
Number varies from 4.5-5 million per mm3
Cytoplasm has haemoglobin, hence appear red in color.
Transpart O2 and CO2

These are larger than erythrocytes and are present in much smaller amount, their ratio to RBC is 1:600
5000-10000 per mm3
They are devoid of hb, colourless
They have prominent nucleus
They are produced in red bone marrow and in lymphatic glands
Life span is of few days
They are immune cells
2 Types- Agranulocytes and Granulocytes
Agranulocyte: 2 types- i) Monocytes– larger cell with bean shaped nucleus ii) Lymphocytes- larger spherical cell with oval nucleus.
Granulocyte: 3 types- i) Eosinophil- spherical cell with bilobed nucleus, stained with acidic dye. Main function to neutralize toxins and have anti-histamine property ii) Basophils- spherical cell with multi lobbed nucleus( S-shaped), stained with basic dye. Produce histamine and heparine iii) Neutrophil- spherical cell with multi lobbed nucleus, stained with neutral dye. Phagocytic function

These are irregular cells, even smaller than RBC
They are often without nucleus, but cytoplasm contains distinct granules
They are the fragments of protoplasm broken from large bone marrow cell; megakaryocytes
Their life span is of 7 days
They release platelet releasing factors which help in blood cloting.

Lymph is similar in composition to blood plasma except that it lacks red blood cells, platelets, plasma protein required for clotting and other macromolecules found in blood.
It flows through lymphatic vessel
helps in immunity.