Question

What is a group of similar cells that perform a particular function called?

Answer 1

Cells are the fundamental components of all living things. The human body is made up of trillions of cells, each with its own unique function. All living organisms rely on cells for their survival. Our bodies are made up of cells that provide structure, absorb nutrients from food, and perform all of the necessary functions.

Complete answer:
Tissues are a collection of similar cells that perform similar functions. Between these cells and an entire organ, tissue level of organization is seen. Tissues, such as muscle tissue, can be formed by combining animal and plant bodies.
The type of functional grouping of multiple tissues results in the formation of organs.
Tissues are present in both animals and plants.
Examples of plant tissues: Meristematic tissue (Apical meristem, Intercalary meristem, Lateral meristem), Permanent tissues (Parenchyma, Collenchyma and Sclerenchyma) etc.
Examples of animal tissues: epithelium, animal tissue, muscle, nerve tissue.
An organ is a collection of tissues that perform specific functions within the body, or it can be a structure made up of at least two tissue types. Each tissue serves a specific purpose in the body. An organ system is made up of several organs.

Thus, a group of similar cells that perform a particular function is called a tissue.

Note:
Histology is the study of tissue, and histopathology is the study of disease-related tissue. The paraffin block is used to embed and section tissues, which is the standard method for studying tissues.Histopathologists are in charge of making tissue diagnoses and assisting clinicians in patient care management.