1) There are three types of muscle tissue - skeletal, cardiac, and smooth muscle. Skeletal muscle is striated and voluntary, attaching to bones, while cardiac muscle is striated and involuntary, found in the heart. Smooth muscle is non-striated and involuntary, surrounding organs. 2) Skeletal muscle is composed of long, cylindrical, multinucleated cells with myofibrils containing alternating bands of actin and myosin fibers that allow for locomotion. 3) Cardiac muscle forms the heart muscle and is made of branched, striated cells joined at intercalated discs, with a centrally located nucleus.

1. Muscular Tissue
By
Mr. Bhagwat More
1st year BHMS
Shri prakashchand Jain BHM
collage jamner, district. Jalg

2. ===) muscular Tissue
Muscle tissue is a composed of cells that
have the special ability to shorten or contrat in order to
produce movement of the body parts
The tissue is highly cellular and is well supplied with
blood vessels
Myology = study of muscles

3. Muscle tissue
Associated with the bones of the
skeleton the heart and in the walls of
hollow organs of the body
Types of muscular Tissue
1) skeletal muscle(striated)
2) smooth
3)cardiac(in the heart )

4. Cardiac Muscle Skeletal Muscles Smooth Muscles
Location Wall of heart Attached to the
skeleton
Wallsnof visceral
organs
Appearance Striated Muscle Striated Muscle Non-striated
Muscle
Nature of
regulation
Involuntary
Muscle
Voluntary muscle Involuntary
Muscle
Function Pumping of blood
for circulation
Locomotion and
body position
Viceral movement
food,gamete
Nuclei Uninucleated Multinucleated Uninucleated
Branching Branched Unbranched Unbranched
Genicity Myogenic Neurogenic Myogenic
Neurogenic

5. Location of nuclei Center Periferi Centre
Fatigue Not possible Possible Not possible
Shape Cylindrical Cylindrical Spindal shape
Length 80 to 100 micron 1 to 4 cm 50 to 200 micron
Diameter 15 to 20 micron 10 to 100 micron 2-5 micron
Myofibrils Present Present Absent
Sarcomere Present Present Absent
Troponin Present Present Unstable

6. Nerve supply Autonomic
nerve
Somatic
nerve
Automatic
nerve

7. ⭐ skeletal muscle
✴️Cells are long and cylindrical
✴️ Multinucleated
✴️. Striated
✴️. Muscle fibers (cells) long, parallel and
cylindrical
✴️. Produce voluntary movement
✴️ Locomotion

9. A skeletal muscle in detail to understand the
structure and mechanisms of contraction.each
organised skeletal muscle in our body is made
of a number of muscle bundles or fascicles
held together
By a common collagenous connective tissue
layer called fascia each muscle bundles
contain a number of muscle fibers

10. ⭐Each muscle fiber is lined by the
plasma membrane called sarcolemma
.enclosing the sarcoplasm .
⭐ Muscle fibers is a syncitium as the
sarcoplasm contains many nuclei
A characteristic features of muscle fibers is the presence of larg
number of parallely arranged filament in the sarcoplasm called
myofilaments or myofibrils
✴️✴️ sarcoplasmic reticulum of the muscle
fibers is the storehouse of calcium ions

11. ✴️. Each myofril has alternate dark and
light bandon it . A detail study of the
myofril has established that the striated
appearance is due to the distribution
pattern of two important proteins -actin
and myosin
✴️both are arranged as a rod like
structure

12. ✴️. The light bands contains actin is called
I-bands or isotropic band . Whereas the
dark band called 'A' or anisotropic band
contain myosin

14. 1)All the myosin --- A band
2)only myosin ----- H zone
3)only actin ---- I band
⭐ myosin ---- primary filament
⭐ Actin ------ secondary filament
A band is dark
I band is light

15. Structure of contractile proteins
⭐

16. ✴️. Each actin (thin) filament is mode of
two 'F'(filamentous ) actins helically wound
to each other
Each f actins is a polymer of monomeric G globular actins .
Two filaments of other proteins ,tropomyosin also run close
the f actin throughout its lengths .
A complex protein troponin is distributed
at regular intervals on the tropomyosin in
the resting state a subunit of troponin
masks .the active binding site for myosin
on the actin filament

17. Cardiac muscle:-
Cardiac Muscle makes up the thick
middle layer of the heart . It is one of the three
types of muscle in the body ,along with skeletal
and smooth Muscles.the myocardium is
surrounded by a thin outer layer called the
epicardium (aka visceral pericardium ) and inner
endocardiu

19. ⭐cardiac muscle made up of striated
unicellular cells joined end to end forming a
network
⭐Arrangement of actin and myosin not as
organised as skeletal muscle
⭐ cardiac muscles forms the musculature of
heart .it is striated and involuntary and
supplied by autonomic nerve fiber

20. ⭐microscopic structure of cardiac Muscle
✴️. Consist of long and thick branching
muscle fibers
✴️. Intercalated discs-specialised cell
junction
✴️. These junction are gap junction and
desmosomes
✴️. Acts as a functional syncytium
✴️. Centrally placed singal oval nucleus
✴️. Faint transverse lines
✴️. Supplied by ANS (sympathetic and
parasymphethetic)

21. Microscopic
structure of
cardiac muscle
✴️. Branched structure
✴️. Centrally placed single
nucleus
✴️. Faint transverse lines
✴️. Supplied by autonomic nerves
system

22. Smooth Muscles
⭐
Smooth Muscles have non striated (plain ) and
involuntary muscle present in almost all organs in the
form of sheaths .bundles or sheaths around other tissue
smooth Muscles from the major contractile tissueof
various organ

23. ⭐ structure having smooth muscle fibers
1)wall of organ like esophagus ,stomach and
intestine in gastrointestinal tract
2) ducts of digestive gland
3) Trachea ,bronchial tube and alveolar ducts
of respiratory tract
4)ureter ,urinary bladder and urethra in
excreatory system
5)wall of blood vessels in circulatory system

24. 6)Arrector pilorum of skin
7) mammary glands ,uterus ,genital
ducts ,prostate gland and scrotum
in the reproductive system
8) Iris and ciliary body of the eye

25. THANK YOU 💫
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