The human body contains an average of 5.5 litres of blood. The bones make up around 15% of the body’s weight. But what is the connection between bones and blood? The answer lies in the word itself! Actually, both blood and bones form a part of the connective tissue in animals. Let us educate ourselves about the various types of connective tissue.
Connective tissues connect and help hold our body together. They provide internal support as well as give and maintain form to the body. They protect the body. The connective tissue can be found everywhere in the body. The connective tissue mainly consists of blood, bones, and areolar tissue.
Blood is a fluid connective tissue. It consists of a liquid matrix called the plasma, in which blood cells are present. So it can be said blood is an important lifeline. It travels all around the body in specialized blood vessels. Blood has many functions to play in the body. Primarily, it helps in the transport of gases, nutrients, hormones as well as the elimination of the waste materials.
There are three types of blood cells that are found in the plasma. They are the Red blood cells (RBC) or Erythrocytes; White blood cells or Leucocytes (WBC) and Thrombocytes or Blood Platelets. The RBCs and the WBC’s are the living components of the blood.
The RBCs have a pigment called hemoglobin, due to which blood appears red in colour. The WBCs help in protecting the body by attacking any foreign body that enters into the body, while the blood platelets are responsible for clotting of blood.
Browse more Topics under Tissues
- Introduction to Tissues
- Meristematic Tissue
- Permanent Tissue
- Epithelial Tissue
- Muscular and Nervous Tissues
If blood is a fluid connective tissue, bones are the hard connective tissue. Bones give support and framework to the body. They protect the internal organs and the muscle tissue attached to the bones helps in movement. The bone tissue is strong and non-flexible. The cells are embedded inside a hard matrix, which is made up of proteins, calcium and phosphorous.
The ligament is the tissue that connects two bones. It is an elastic tissue which has considerable strength. Ligaments have a very little matrix. The bones are also connected to muscles. The tendons are the types of tissues that connect the bones and muscles. They are fibrous tissues and have great strength. But the flexibility of the tendon tissue is limited.
Similarly, cartilage is another type of connective tissue that has a solid matrix. It contains proteins and sugars. The cartilage tissue has widely spaced cells. Cartilage is also an important connective tissue as it helps in smoothening the bone surfaces at the joints. Cartilage is also present in the trachea, nose, ears, and larynx.
The areolar tissue is a loose connective tissue that can be seen between the skin and muscles; in the bone marrow as well as around the blood vessels and nerves. The areolar tissue fills the spaces between the different organs and connects the skin to the underlying muscles. And therefore, it provides support to the internal organs as well as help in the repair of tissues.
Learn more about Muscular and Nervous Tissue.
The areolar tissue consists of many types of fibres and cells. Among the cells are the adipocytes. These adipocyte cells together make the adipose tissue or the fat tissue. It is in these cells that fat is stored in the form of fat globules. Due to the storage of fat, the adipose tissue acts as an insulator.
Solved Questions For You
Q. Name the connective that joins two bones.
Ans. The names are as follows:
- Areolar tissue
Ans. The correct option is “A”. The ligament is the connective tissue that joins two bones.
Q. Fat is stored in which tissue? What is its function?
Ans. Fat is stored in the adipose tissue. It acts as an insulator.