connective and nervous tissue

1. ANIMAL TISSUE
PART-2
CONNECTIVE TISSUE
AND
NERVOUS TISSUE
BY:
MISS RITIMA
APS RAKHMUTHI

2. Connective tissue
 The cells of a connective tissue are loosely scattered in a
matrix. The matrix can be a fluid, jelly like, dense or rigid.
The nature of matrix depends on the function a connective
tissue serves. Following are the various connective tissues:
 Areolar Connective Tissue: Areolar tissue is found
between skin and muscles, around blood vessels and nerves
and in bone marrow. Areolar tissue fills the gap between
tissues and provides support. It also helps in repair of
tissues.
 Adipose Tissue: Adipose tissue is composed of fat
globules. This tissue is found below the skin and beneath
the organs. Adipose tissue provides insulation and works as
a cushion.

3. -
Bone: Bone is mainly composed of osteoblasts. Bone
makes the skeletal system. Skeletal system is
responsible for providing structural framework to the
body. It provides protection to important organs and
facilitates movements.
Cartilage: Cartilage is mainly composed of
chondrioblasts. Cartilage is present at the ends of
articulatory bones. Cartilage is also present in
external ear, bronchii, etc.
Blood: Blood is composed of blood cells, platelets
and plasma. Blood plays an important role in
transportation of various substances in the body. It
also helps in osmoregulation and temperature
control.

4. Microscopic view of areolar tissue

5. Microscopic view of adipose tissue

6. Nervous tissue
 Nervous or the nerve tissue is the main tissue of
our nervous system. It monitors and regulates the
functions of the body.
 Nervous tissue consists of two cells: nerve cells
or neurons and glial cells, which helps transmit
nerve impulses and also provides nutrients to
neurons.
 Brain, Spinal Cord, and nerves are composed of
nervous tissue, they are specialized for being
stimulated to transmit stimulus from one to
another part of the body rapidly.

7. Structure Of Nervous Tissue
 It is made of nerve cells or neurons, all of which consists
of an axon. Axons are long stem-like projections emerging
out of the cell, responsible for communicating with other
cells called the Target cells, thereby passing impulses.
 The main part is the cell body which contains the nucleus,
cytoplasm and cell organelles. Extensions of the cell
membrane are referred to as processes.
 Dendrite is a highly branched processes, responsible for
receiving information from other neurons and synapses
(specialized point of contact). Information of other neurons
is provided by dendrites to connect with its cell body.
 Information in a neuron is unidirectional as it passes
through neurons from dendrites, across the cell body down
the axon.

8. Nervous Tissue Location
 The nerve tissue or the nervous tissue is the chief
tissue component of the two major parts of the
nervous tissue – Central nervous system(CNS) formed
by the spinal cord and the brain and the branching
peripheral nerves of the peripheral nervous system
(PNS) that control and regulate the functions of the
body and their activities.
 The nervous tissue is located in the peripheral
nerves all through the body and also in the organs of
the central nervous system such as the spinal cord and
the brain. The nervous tissue consists of the nerve
cells or the neurons.
Neurons are specialized cells that react to stimuli by
generating signals through the axons, which are
elongated structures arising from the cell body

9. Structure of neuron

10. Characteristics Of Nervous Tissue
 Nervous tissue makes up for the CNS and PNS of
the nervous system.
 Contains two distinct cells – neurons and glial cells.
 It consists of the dendrites, cell body, axon and
nerve endings.
 Neurons secrete chemical neurotransmitters which
are responsible for stimulating other neurons as a
result of a stimuli.
Presence of specialization at axonal terminals called
synapsis.
 Nerve cells live long, cannot be divided and
replaced(except memory cells).

11. Function of nervous tissue
 Neurons generate and carry out nerve impulses.
They produce electrical signals that are
transmitted across distances, they do so by
secreting chemical neurotransmitters.
 Responds to stimuli.
 Carries out communication and integration
Provides electrical insulations to nerve cells and
removes debris.
 Carries messages from other neurons to the cell
body.