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.

Gaurab Karki — Fri, 23 Feb 2018 07:28:55 +0000

Connective tissues are the major supporting tissue of the body. It is composed of variety of cells, fibre (non-living products of cell) and semi-solid matrix between cells.

Connective tissue ranges from avascular to highly vascular.
Composition: Composed mainly of nonliving extracellular matrix that separates the cells of the tissue.
Location: It is present in between different tissue and organs. It can be found in and around the body organs. skeletal tissue present in the form of bone and cartilage, and fluid connective tissue as blood and lymph are connective tissue.

It binds various tissue together like skin with the muscles and muscles with bones
It form inter cellular substance between cells of different types of tissue, so that help in friction less movement of the body organ
It forms sheaths around the body organs and make a kind of packaging tissue
The areolar tissue protects the body against wound and infection
The adipose tissue stores fats and insulates the body against heat loss
The supportive tissue forms shape and the frame work of the body
The haemopoitic tissue produce blood
The lymphatic tissue helps in body immunity