Cells and Tissues
The smallest, basic, and structural component of the body is a cell. It is the basic functional unit of life. No organism can exist on this Earth without a cell. Thus, it is the fundamental unit. These cells perform the major functions of the body. The term cell was given by Robert Hooke, who stated that all organisms’ bodies, whether unicellular or multicellular, are made of cells. In single-celled organisms such as amoeba and protozoa, all the body functions are performed by a single cell. The multicellular organisms have collective cells which perform a specific function in the body.
Types of Tissues
The smallest, basic, and structural component of the body is the cell. It is the functional unit of life. No organism can exist on this Earth without a cell. An organism's body, whether unicellular or multicellular, is made of cells. In unicellular organisms such as amoeba and protozoa, all the body functions are performed by a single cell. The multicellular organisms have collective cells which perform a specific function in the body. Tissues are a group of cells that work together to perform a particular function in the body. They make a series of networks or a system to coordinate with the different tissues in the body, forming a tissue system. The word tissue is derived from the Latin word 'weave.' Plants and animals have various kinds of tissue systems that differ in their work and composition according to the different requirements.
Tissue System
The smallest, basic, and structural component of the body is the cell. It is the functional unit of life. No organism can exist on this Earth without a cell. An organism's body, whether unicellular or multicellular, is made of cells. In unicellular organisms such as amoeba and protozoa, all the body functions are performed by a single cell. The multicellular organisms have collective cells which perform a specific function in the body. Tissues are a group of cells that work together to perform a particular function in the body. They make a series of networks or a system to coordinate with the different tissues in the body, forming a tissue system. The word tissue is derived from the Latin word 'weave.' Plants and animals have various kinds of tissue systems that differ in their work and composition according to the different requirements.
What are the reticular
fibers of the connective tissue
and where can they be found?
Connective tissue is a tissue which connects, supports, binds, or separates other tissues or organs. The connective tissue is found mostly in between other tissue types. The connective tissue consists of three main components: fibers (elastic and collagenous fibers), ground substance (amorphous gel-like substance that contains components of the extracellular matrix) and cells (include fibroblasts, adipocytes, macrophages, mast cells and leukocytes).
- Connective tissue is broadly classified into connective tissue proper and special connective tissue.
- Connective tissue proper consists of loose connective tissue and dense connective tissue.
- Loose connective tissue has more ground substance and very less fibers. The loose connective tissue is present in areolar tissue, reticular tissue, and adipose tissue.
- Dense connective tissue has less ground substance and more fibers. The dense connective tissue is present in tendons and ligaments.
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