15 julio, 2024

Animal tissues: what they are, characteristics, functions, types, examples

We define what animal tissues are, what are their characteristics, the types that exist, their functions, and we give several examples.

What are animal tissues?

The animal tissues They are structures made up of cells that fulfill specific functions in the body of an animal. Tissues may be composed of a single cell class or a mixture of several cell classes.

Animal tissues are formed from cells that group to shape. There are different types of animal tissues and each of them fulfills a specific function, in addition to the fact that the structure and origin is different in each case.

Animal tissues can be divided into four types and all of them are found in most living beings that belong to the animal kingdom. These tissues are: epithelial, connective, muscular and nervous, all fulfilling different functions in animal organisms.

All the cells that make up members of the animal kingdom are grouped together as tissues, which not only vary in structure, but also in shape. Without these tissues, animals could not carry out their bodily functions.

Characteristics of animal tissues

– Tissues are groups of cells that are very close to each other and together perform a specific function.

– Tissues join together to form organs, such as the heart and brain. They also serve other important functions, such as protecting the body, storing energy, and regulating movement.

– They are composed of specialized eukaryotic cells that perform a variety of functions in the body of animals.

– They are grouped into four types, according to the function they fulfill in the body: epithelial tissue, connective tissue, muscle tissue and nervous tissue.

– In most animal bodies, including those of human beings, all four types of tissues can be found.

types of muscle tissue

There are four basic types of animal tissues, which are further divided into different subtypes. The four main ones are: epithelial, muscular, nervous and connective.

epithelial tissues

Epithelial tissues are made up of layers of cells that line the body. These tissues are responsible for covering, protecting, absorbing and secreting substances. In addition to the outer layers of the organism, there are also epithelial tissues in the linings of the mouth, nose, and digestive system.

Muscle tissues

Muscle tissues can be of three types: smooth, which are located in the lining of the organs; skeletal, which are attached to the bones and support the movement of the body; and cardiac muscle tissues, located in the heart.

nervous tissues

Nervous tissues are made up of neurons and form a complete nervous system, which includes the spinal cord and the brain.

connective tissues

Finally, connective tissues are made of different cells that support various functions of the body. Among these types of tissues are fat, bones, blood, and cartilage.

Functions of animal tissues

Let’s look at the function of each type of animal tissue:

The epithelial tissues they cover surfaces, as well as ducts and cavities, such as organs or the respiratory tract. In general, this type of tissue is made up of a single layer of cells, although there are also cases with more than one layer. Its function is to protect, providing a barrier between external factors and the organs they cover. On the other hand, it provides protection to the body from possible attacks by microorganisms, injuries and fluid loss. In addition, it allows the body to discard toxins, through the skin, as happens with sweat.
He nervous tissue It is responsible for transmitting nerve impulses throughout the body. In the case of the myelin sheath, one of the types of nervous tissue, its main function is to insulate the nerve fibers and increase the speed of the impulses that the cells transmit.
The connective tissues they can support, connect or separate different types of tissues, as well as organs. They are made up of cells and fibers such as collagen.
The Muscle tissues they support the movement of the bones, they allow the contraction of the muscles and organs, they are related to the stabilization and posture of the organism, and they regulate the volume of the organs.

Examples of animal tissues

striated muscle tissue: connects to the bones, allowing specific parts of the body to move.
central nervous systeml: is formed with the spinal cord and the brain. The set of non-neuronal cells that support this system are called neuroglia.
The blood It is a tissue made up of both cells and intercellular material. In this tissue there is plasma, glucose and proteins.
smooth muscle tissue: Allows the body to perform internal movements. It is located in the walls of some organs.
loose connective tissue: found abundantly in the body and consists largely of fibers, especially collagen.
adipose tissue: It is made up of cells called adiposities, which allow the accumulation of fats, especially triglycerides. It fulfills insulating functions, to protect from hot and cold temperatures.
Woven bone: The cells that make up this tissue are osteocytes, which are made up of a substance in which calcium and phosphorus salts are found.
He simple columnar epithelial tissue it has a layer of cylindrical cells, it can be found in the intestine, in the nasal sinuses and in the renal tubules.
He cartilaginous tissue it is elastic and does not contain blood vessels. It serves as a lining for joints, as a union between the ribs and the sternum and as a reinforcement in different parts of the body.
cardiac tissue: This tissue is similar to skeletal muscle fiber, it is found in the walls of the heart, an organ that contracts rhythmically and involuntarily.

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