Tissues can be defined simply as a group of cells with similar shapes and functions. They form a cellular organisational level that serves as a bridge between cells and organ systems. The functional groups of tissues are then combined to form organs. Let’s go over the different types of tissues in each organ in detail.
Histology is the study of tissue, whereas histopathology is the study of disease-related tissue. The paraffin block is the standard tool for studying tissues because it allows easy embedding and sectioning. Tissue is derived from the English word “tissu.” This is the past participle of tissue, which means “to weave.” Histopathology is a branch of science that studies the interconnection of diseases.
Definition of tissue
Tissue is defined as “the biological organisational level between cells that forms a complete organ.” These are typically a collection of cells with extracellular material similar to one another.
Tissue classification
Tissues are divided into two categories:
- Tissues from plants
- Tissues of animals
Different types of animal tissues:
Animal tissues are of various types. The function of animal tissues varies depending on the organism. Animal tissues are classified into four types:
- Connective tissues:
The body’s and organs’ form is preserved because of the connective tissues. Internal support is another function of these tissues. They help in the preservation of the organs. They also prevent germs from entering the body. Tissues like this play an important role in the transportation of many bodily substances, such as nutrition, hormones, gases and waste.
Examples of connective tissues include ligaments, tendons and cartilage. The three main connective tissue forms are fibrous, fluids and skeletal fluids.
- Muscle tissues:
The word “muscle tissue” comes from the fact that it helps the body move. They create force and motion for the body’s movement and movement inside organs. Skeletal, cardiac and visceral or smooth muscle tissues are the three main types of muscle tissue. Muscle tissues’ principal roles include aiding with different bodily actions such as running, lifting, leaping, picking, etc.
They help to keep the body in a good posture by providing support. Voluntary as well as involuntary motions are linked to these tissues. A major part of blood pumping and artery control is performed by involuntary muscle tissues. They also help the body to take in and expel air.
- Nervous tissues:
The term “nerve tissues” refers to tissues mostly found in the brain and spinal cord. They are typically present in the brain and spinal cord. These tissues are in charge of the internal communication network. They are needed for the way our brains work. They also react to stimuli and send information throughout the body. Controlling a person’s emotions, logic and memory are all dependent on these tissues.
- Epithelial tissues:
What type of tissue does skin contain? The answer is epithelial tissues. These are the tissues that cover the outside of body organs, like the skin and the inner lining of the digestive tract. Epithelial tissues are extremely important in the body of an organism. They serve various purposes, including sensory reception, filtration and various other metabolic activities. They are also useful in processes such as diffusion and secretion. Pathogens are also kept at bay by epithelial tissues in internal organs. These tissues aid in secreting enzymes, mucus, hormones and various other substances.
Various types of plant tissues
Plant tissues have been classified using two criteria. The first is based on plant parts, whereas the second is based on cell types of tissues:
Plant tissues are classified according to plant parts as follows:
Epidermis tissues- These tissues make up the outer surface of leaves.
Vascular tissues- They aid in the transportation of nutrients and other fluids.
Ground Tissues- These tissues aid in the production of nutrients through photosynthesis.
Plant tissues are classified into two types based on their cell types as follows:
- Meristematic tissues:
This type of cell comprises cells that are constantly dividing, resulting in the increase of plant length and thickness. Furthermore, meristematic tissues can be classified based on their plant location, functions, origin and development.
Apical, lateral and intercalary meristematic are three types of meristematic tissues.
- Permanent tissues:
These tissues are a collection of cells related in several ways, including their origin, structure and various functions. They aid in the complete growth of plants. These tissues perform various functions, including aiding in the flotation of aquatic plants. They also aid in storing starch, fats, oils and proteins. They also transport chloroplasts. Permanent tissues are subdivided into simple, complex and secret permanent tissues.
Conclusion:
Histology is the study of the shape and organisation of cells in tissues. The embryo’s three germ layers, namely the ectoderm, mesoderm and endoderm, give rise to all cells and tissues in the body. Different types of tissues form membranes that enclose organs, allow organs to interact without friction and hold organs together. Synovial membranes are connective tissue membranes that line the joints and protect them. Epithelial membranes are epithelial tissues adhering to a connective tissue layer. There are three types of epithelial membranes: mucous (which contains glands), serous (which secretes fluid) and cutaneous (which forms the skin).animal have four types of tissues: connective tissues, epithelial tissues, muscle tissues and nervous tissues. Connective tissues support and connect other tissues.