What is the structure of nervous tissue?

Nervous tissue. Nervous tissue or nerve tissue is the main tissue component of the two parts of the nervous system; the brain and spinal cord of the central nervous system (CNS), and the branching peripheral nerves of the peripheral nervous system (PNS), which regulates and controls bodily functions and activity.

Moreover, what is the basic structure of a nerve?

Each neuron contains a nerve cell body with a nucleus and organelles such as mitochondria, endoplasmic reticulum, and Golgi apparatus. Branching off the nerve cell body are the dendrites, which act like tiny antennae picking up signals from other cells.

What is the structure and function of nerve cells?

Structure and Function: Nerve Cells. Neurons are nerve cells that originate, process, transmit, and receive nerve impulses. They are connected to other neurons or to cells in muscles, organs, or glands.

What is the structure of the nervous system?

The nervous system is divided into two parts: the central nervous system consisting of the brain and spinal cord. These structures are protected by bone and cushioned from injury by the cerebrospinal fluid (CSF) the peripheral system which connects the central nervous system to the rest of the body.

How is the size and shape of a nerve cell related to its function?

Cell Shape. Each cell type has evolved a shape that is best related to its function. For example, the neuron in Figure below has long, thin extensions (axons and dendrites) that reach out to other nerve cells. The extensions help the neuron pass chemical and electrical messages quickly through the body.

What does the nerve tissue do?

To do all these things, cells in nervous tissue need to be able to communicate with each other by way of electrical nerve impulses. The cells in nervous tissue that generate and conduct impulses are called neurons or nerve cells. These cells have three principal parts: the dendrites, the cell body, and one axon.

How many types of nervous tissue are there?

Although the nervous system is very complex, there are only two main types of cells in nerve tissue. The actual nerve cell is the neuron. It is the “conducting” cell that transmits impulses and the structural unit of the nervous system. The other type of cell is neuroglia, or glial, cell.

What are the characteristics of a nervous tissue?

Integration and communication are the two major functions of nervous tissue. Nervous tissue contains two categories of cells — neurons and neuroglia. Neurons are highly specialized nerve cells that generate and conduct nerve impulses.

What are the two types of cells in nervous tissue?

Nervous tissue consists of two main types of cells: neurons and neuroglia. Nerve cells, or neurones (also written ‘neurons’) transmit nerve impulses that move information around the body.

What are the two types of connective tissue?

Special connective tissue consists of reticular connective tissue, adipose tissue, cartilage, bone, and blood. Other kinds of connective tissues include fibrous, elastic, and lymphoid connective tissues.

How do nerve cells communicate with each other?

Here is how neurons (nerve cells) communicate: An electrical signal travels down the axon. Chemical neurotransmitter molecules are released into the synapse. The neurotransmitter molecules bind to receptor sites on the releasing neuron and the second neuron.

What are the two types of nervous systems?

In vertebrates it consists of two main parts, the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS consists of the brain and spinal cord. The PNS consists mainly of nerves, which are enclosed bundles of the long fibers or axons, that connect the CNS to every other part of the body.

Are satellite cells in the CNS or PNS?

In the central nervous system, glia develop from the ventricular zone of the neural tube. These glia include the oligodendrocytes, ependymal cells, and astrocytes. In the peripheral nervous system, glia derive from the neural crest. These PNS glia include Schwann cells in nerves and satellite glial cells in ganglia.

Where is the nerve tissue found in the body?

Nervous tissue is found in peripheral nerves throughout the body and in the organs of the central nervous system, the brain and spinal cord. Nerve tissue is composed of neurons, which are specialized cells able to react to stimuli by sending a signal down a long strand of cell known as an axon.

Are the functional units of the nervous tissue?

Although the nervous system is very complex, nervous tissue consists of just two basic types of nerve cells: neurons and glial cells. Neurons are the structural and functional units of the nervous system.

What are neurons and how do they work?

Neurons are nerve cells that transmit nerve signals to and from the brain at up to 200 mph. The neuron consists of a cell body (or soma) with branching dendrites (signal receivers) and a projection called an axon, which conduct the nerve signal.

What type of tissue is skin?

There are four main types of tissue: muscle, epithelial, connective and nervous. Each is made of specialized cells that are grouped together according to structure and function. Muscle is found throughout the body and even includes organs such as the heart. Our outer layer of skin is epithelial tissue.

What is the neural tissue?

Neural tissue is specialized for the conduction of electrical impulses that convey information or instructions from one region of the body to another. About 98% of neural tissue is concentrated in the brain and spinal cord, which are the control centers for the nervous system.

What is an example of connective tissue?

The connective tissues include several types of fibrous tissue that vary only in their density and cellularity, as well as the more specialized and recognizable variants—bone, ligaments, tendons, cartilage, and adipose (fat) tissue.

What is the basic unit of the nervous system?

QUESTION #4.1: What is the basic unit of the nervous system? The neuron is a single nerve cell, and you have billions of them. There are three basic types of neurons: association, afferent, and efferent. The association neurons comprise the central nervous system (CNS) that is the brain and spinal cord.

What is the function of the epithelial tissue?

Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport, and sensing. Epithelial layers contain no blood vessels, so they must receive nourishment via diffusion of substances from the underlying connective tissue, through the basement membrane.

What type of tissue is in the bone?

connective tissue

Why is there a difference in the appearance of gray matter and white matter?

The CNS has two kinds of tissue: grey matter and white matter, Grey matter, which has a pinkish-grey color in the living brain, contains the cell bodies, dendrites and axon terminals of neurons, so it is where all synapses are. White matter is made of axons connecting different parts of grey matter to each other.

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