Animal Tissue

Animal Tissue

The animal tissues can be divided into following categories -
1. Epithelial Tissue
2. Connective Tissue
3. Muscular Tissue
4. Nervous Tissue

1. Epithelial Tissue

Epithelial tissue cover the external surface of the body and internal free surface of many organs. Epithelial cell arranged very close to each other. There is no blood vessels supplying nourishment to epithelial cells. They receive nourishment from underlying connective tissue. The principle functions of epithelial tissues are covering and lining of free surface.
Example : skin, intestine, gland, hollow organ like fallopian tube, nasal passage bronchioles, trachea etc.

2. Connective Tissue

These tissue connect and bind different tissues or organs. It is provided the structure frame work and mechanical support to body. It play role in body as defense tissue, repair fat storage etc.
Example : Adipose tissue found beneath the skin. Ligament made up of fibrous connectivity tissue. Cartilage, bone and blood.
» Blood is only tissue which is found in the form of fluid.

3. Muscular Tissue

This is also know as contractile tissue. All the muscles of the body are made up of this tissue.
Muscle tissue is of three types -
(a) Unstriped
This muscles tissue is found on the walls of those parts which do not controlled by Will. These are called involuntary muscle, like-Alimentary canal, Rectum, Ureter, Blood vessels. Unstriped muscles control the motions of all those organs the move or there own.

(b) Striped
These muscles are found in the parts of the body move voluntary. Normally one or both the end of these muscles turns and connect with bones as tendon.

(c) Cardiac
These muscles are found only on the walls of the heart. The contraction and expansion of the heart is due to these muscles that move through the life without fail.
» There are 639 muscles in the human body.
» The largest muscle of the human body is Gluteus Maximus.
» The smallest muscle of the human body is Stapedius.

4. Nervous Tissue

This tissue is also called sensitive tissue. The nervous systems of the organism is made up of these tissues.
This is made up of two specific cells –
(a) Nerve cell or Neurons
(b) Neuroglia

Nervous tissue controls all the voluntary and involuntary activities of the body.