Tissue Blog 8

Hello Learner,

In the previous blog, we have discussed Epithelial Tissue. animal tissue in brief. I hope you must read about animal tissue given in text book.

Today, we will be discussing more about Connective Tissue in details

At the end to today's topic, you will be able to
1. Explain connective tissue.
2. Describe different types of connective tissue.
3. Tell the location and function of different type of connective tissue.
4. Draw diagrams of different type of connective tissue.

So, let us start the topic...... 

Click on the link https://www.youtube.com/watch?v=DebIq3fEBVo

It will you all brief idea about connective tissue.

    Connective Tissue

                         https://www.youtube.com/watch?v=4HNbspnFyIE

This tissue serve to connect or bind the cells of other tissues in the body and gives them rigidity and support. It is found throughout the body. It is made up of three basic components: living cells, thick and fibrous structures called fibres and non-living intercellular matrix. Various types of connective tissues are-

1.   Blood- it is a bright red-coloured fluid connective tissue. The body of an adult human being contain about 6 litres of blood. Blood consists of a straw coloured fluid called plasma (60% of blood volume) in which different types of corpuscles or cells (40% of blood volume) are present. The blood cells are

(i)          Erythrocytes or RBC’s

(ii)         Leucocytes or WBC’s

(iii)        Blood Platelets

• The plasma contains proteins, salts and hormones.
• Blood flows and transport gases, digestive food, hormones and waste materials to different parts of the body.

Functions of blood

(i)          RBC’s help in transportation of oxygen and carbon dioxide.

(ii)         Helps in transportation of food and waste products.

(iii)        Helps in the distribution of hormones.

(iv)       Maintains the water level of the body.

(v)         It also maintains temperature of the body.

(vi)       Because of WBC’s, it provides resistance to the body.

(vii)      Blood platelet help in blood clotting.

https://www.youtube.com/watch?v=rbwT2HXpBv0

2.   Bone & Cartilage

Bone	Cartilage
1.   It is a rigid, non-flexible and strong. We cannot bend the bones.     2.   Matrix is made up of a protein called ossein.     3.   It forms the framework that supports the body.     4.   It also anchors the muscles and supports the main organs of the body.          5.   Bone cells are embedded in a hard matrix that is composed of calcium and phosphorous compounds.	1.   It is a semi-rigid flexible and soft structure. We can fold the cartilage of ears.     2.   Matrix is made up of a protein called chondrin.     3.   Cartilage have widely spaced cells.     4.   The solid matrix is composed of proteins and sugar.          5. Cartilage smoothens bone surfaces at joints and is also present in the nose, ear, trachea and larynx.

3.   Tendons & Ligaments

Tendons	Ligaments
1.   Have parallel arranged collagen fibres.     2.   Tendons connect muscles to bones.     3.   Tendons are fibrous tissue with great strength but limited flexibility (inelastic).	1.   Have loose network of irregularly arranged yellow fibres.     2.   Ligaments connect bone to bone.     3.   Ligaments are strong and very elastic.

                                                                                                  

    4.   Areolar tissue

(i)          It is the simplest connective tissue.

(ii)         It is made up of transparent gelatinous matrix in which various types of fibres and cells are embedded.

(iii)        Areolar connective tissue is found between the skin and muscles around blood vessels and nerves and in the bone marrow.

(iv)       It fills the space inside the organs, support internal organs and helps in repair of tissues.

   

    5.   Adipose tissue

(i)          It is present below the skin and between the internal organs. It is more in females as compared to males.

(ii)         It is modified areolar tissue. Cells store fat globules hence called adipose cells or adipocytes.

(iii)        This tissue stores fats and acts as insulator.

For more information: https://www.youtube.com/watch?v=L3OydHheqKA

Home Assignment
1. Complete the note in your biology notebook.