https://youtu.be/0ecjvyWnxLc https://youtu.be/GiGPndY04p4 https://www.youtube.com/channel/UCrrAABI7QDRCJ1yMrQCip_w/videos https://www.facebook.com/ShaistaJabeeen/ https://www.facebook.com/Human-Physiology-Lectures-100702741804409/ Nervous tissues and types of Nervous Tissue Neuroglia Astrocytes Microglial Cells Ependymal Cells Oligodendrocytes Satellite Cells Schwann Cells Neurons Types of Neurons Overview PPT Physiology Biology Science

1. SHAISTA JABEEN
Assistant Professor
Department of Clinical Laboratory Sciences
Faculty of Allied Health Sciences and Technologies
Nervous Tissue

2. NEURON
A neuron is a cell in the nervous tissue that transmits
electrical and chemical signals throughout the body.
A neuron has three main parts:
a cell body,
dendrites, and
a single axon.

4. Types of Neurons
Neurons differ based on
function (afferent, efferent, interneurons) and
structure (multipolar, bipolar, unipolar, anaxonic),
which is defined by the number and type of projections extending
from the cell body.

8. NEUROGLIA
Oligodendrocytes, ependymal cells, microglia, and astrocytes are
neuroglia found in the central nervous system (CNS),
while Schwann cells and satellite cells are neuroglia found in the
peripheral nervous system (PNS).

9. An oligodendrocyte is a glial cell that generates myelin, which wraps
around axons in the CNS.
An ependymal cell lines the spinal cord and ventricles of the brain. It
produces and secretes cerebrospinal fluid (CSF).
A microglia cell mediates immune responses in the CNS. It can
transform into a special type of macrophage that can clear up neuronal
debris via phagocytosis.
An astrocyte is a starshaped glial cell that supports neurons by
connecting them to nutrient supplies and repairing nervous tissue after
injury.

11. Schwann cells and satellite cells are neuroglia found in the PNS.
Like an oligodendrocyte in the CNS,
the Schwann cell provides myelination to axons in the PNS. Each
individual Schwann cell sheaths only one axon. It has phagocytic
activity, which means it can engulf and clear cellular debris in order
to facilitate the regrowth for PNS neurons.
A satellite cell is a glial cell in the PNS that surrounds the cell
bodies of neurons in sensory, sympathetic, and parasympathetic
ganglia.
A ganglion is a mass of tissues that contains several cell bodies. By
functioning in this capacity, satellite cells provide support in a way
that is similar to astrocytes in the CNS. Satellite cells also modulate
the PNS following injury and inflammation.

12. THANKYOU...