Explain the types and functions of connective tissue properly.
Explain the types and functions of connective tissue properly.
Connective tissues: Connective tissues, as the name implies, support and connect different tissues and organs of the body. They are widely distributed in every part of the body. They originate from the mesoderm (the middle germinal layer of the embryo).
The classification of connective tissue is as follows:
1.Loose Connective Tissue: Loose connective tissues are present all over the body, where support and elasticity both are needed. Blood vessels, nerves and muscles, all have a loose connective tissue wrapping.
1.1. Areolar Tissue: It is present under the skin and supports epithelium. It contains randomly distributed fibres, fibroblasts, mast cells and macrophages. It supports the organs present in the abdominal cavity, fills the space between muscle fibres and wraps around blood and lymph vessels.
1.2. Adipose Tissue: They are present under the skin and store fat. It acts as a shock absorber and helps in maintaining body temperature in colder environments.
2. Dense Connective Tissue: In the dense connective tissue, fibroblast cells and fibres are compactly packed. Their main function is to support and transmit mechanical forces.
2.1. Dense regular tissue: In the dense regular connective tissue, the orientation of fibres are regular. The collagen fibres are present between the parallel running bundles of fibres. Eg: Tendons attach bones to skeletal muscles. Ligaments attach two bones together.
2.3. Dense irregular tissue: There are many fibres including collagen, which are oriented irregularly or randomly. The irregular arrangement gives uniform strength in all directions. Fibres may form a mesh-like network. This type of tissue is present in the dermis of the skin.
3. Specialised Connective Tissue: There are supportive connective tissues, that help in maintaining correct posture and support internal organs.
3.1. Cartilage: In humans, cartilage is present between the bones of the vertebral column, in the external ear, nose and hands. Cartilage possesses elasticity, but is firm too.
3.2. Bones: Bone is the hardest connective tissue and helps in maintaining the shape and posture of the body, it protects internal organs. They are rich in collagen fibres and calcium, which give strength.
3.3. Blood: Blood is made up of various cells present in the plasma. The blood contains red blood cells (RBCs), white blood cells (WBCs), platelets and plasma.
3.4. Lymph: Lymph drains into the blood and transports absorbed fat to the blood, which cannot enter the bloodstream directly. Lymph has white blood cells in the liquid matrix.
Connective tissues: Connective tissues, as the name implies, support and connect different tissues and organs of the body. They are widely distributed in every part of the body. They originate from the mesoderm (the middle germinal layer of the embryo).
The classification of connective tissue is as follows:
1.Loose Connective Tissue: Loose connective tissues are present all over the body, where support and elasticity both are needed. Blood vessels, nerves and muscles, all have a loose connective tissue wrapping.
1.1. Areolar Tissue: It is present under the skin and supports epithelium. It contains randomly distributed fibres, fibroblasts, mast cells and macrophages. It supports the organs present in the abdominal cavity, fills the space between muscle fibres and wraps around blood and lymph vessels.
1.2. Adipose Tissue: They are present under the skin and store fat. It acts as a shock absorber and helps in maintaining body temperature in colder environments.
2. Dense Connective Tissue: In the dense connective tissue, fibroblast cells and fibres are compactly packed. Their main function is to support and transmit mechanical forces.
2.1. Dense regular tissue: In the dense regular connective tissue, the orientation of fibres are regular. The collagen fibres are present between the parallel running bundles of fibres. Eg: Tendons attach bones to skeletal muscles. Ligaments attach two bones together.
2.3. Dense irregular tissue: There are many fibres including collagen, which are oriented irregularly or randomly. The irregular arrangement gives uniform strength in all directions. Fibres may form a mesh-like network. This type of tissue is present in the dermis of the skin.
3. Specialised Connective Tissue: There are supportive connective tissues, that help in maintaining correct posture and support internal organs.
3.1. Cartilage: In humans, cartilage is present between the bones of the vertebral column, in the external ear, nose and hands. Cartilage possesses elasticity, but is firm too.
3.2. Bones: Bone is the hardest connective tissue and helps in maintaining the shape and posture of the body, it protects internal organs. They are rich in collagen fibres and calcium, which give strength.
3.3. Blood: Blood is made up of various cells present in the plasma. The blood contains red blood cells (RBCs), white blood cells (WBCs), platelets and plasma.
3.4. Lymph: Lymph drains into the blood and transports absorbed fat to the blood, which cannot enter the bloodstream directly. Lymph has white blood cells in the liquid matrix.
