- Muscular tissue consists of elongated cells which are called MUSCLE FIBRES.
- Muscles contain special Protein called contractile proteins.
- The contractile proteins are Actin and Myosin.
- The role of contractile protein is contraction and relaxation and thus helps in Movement.
STRIATED MUSCLES
- They are voluntary in nature. I.e. they move according to our will. So also known as Voluntary Muscles.
- They are attached to bones so they are called as Skeletal Muscles.
- When viewed under Microscope, the Muscles shows Alternate light and dark bands and thus known as Striated Muscles.
- STRUCTURE:
- Cells are long and cylindrical.
- Unbranched.
- Multinucleated.
- Found in:
- INNER LIMBS
- HANDS
- EYELIDS
SMOOTH MUSCLES
- They are involuntary in nature i.e. they do not work according to our will. So also known as involuntary muscles.
- They do not have striations so they are called as Unstriated Muscles.
- STRUCTURE:
- Cells are long with pointed ends.
- Having single nucleus*
- FOUND IN:
- Iris of the eye
- Bronchi (present in lungs)
- Alimentary canal
- Uterus.
CARDIAC MUSCLE
- Involuntary in nature
- They have striations present on the muscles so called as striated muscles.
- Presence of Intercalated disc*
- Present in the heart.
- Structure:
- Long
- Branched
- Nucleated
- Have intercalated disc.
