Cardiac and skeletal muscles1

presentación sobre el músculo cardíaco realizada por Laura.

2. Cardiac and Cardiac and
skeletal musclesskeletal muscles
Cardiac muscles:  is a type of
involuntary
Striated muscle found in the walls of the
heart specially in the myocardium.
Myocardium

3. Cardiac musclesCardiac muscles
Main types of cells:Main types of cells:
-Myocardial cells:Myocardial cells: Make up the artrium (the chamber in Make up the artrium (the chamber in
which blood enters the heart) and ventrical (where blood is which blood enters the heart) and ventrical (where blood is
pumped out of the heart) of the heart. These cells are pumped out of the heart) of the heart. These cells are
necessary to the beating of the heart.necessary to the beating of the heart.

4. Cardiac musclesCardiac muscles
Main types of cells:Main types of cells:
- - Electrical cellsElectrical cells: :
-They -They ccarry the impulses arry the impulses
that are responsible for the that are responsible for the beatingbeating
of the heart. of the heart.
- - ResponsibleResponsible for for several several
functionsfunctions, like generate and send , like generate and send
out electrical impulses and receive out electrical impulses and receive
and respond to electrical impulses and respond to electrical impulses
from the brain.from the brain.
Heart Cell

5. Cardiac musclesCardiac muscles
Structure of cardiac Structure of cardiac
tissuetissue
- - Cardiac muscle fibers are Cardiac muscle fibers are
striatedstriated, , branchedbranched, and have a , and have a
singlesingle central central nucleusnucleus. These . These
cells are cells are attachedattached at their ends to at their ends to
the fibres by thick plasma the fibres by thick plasma
membranes.membranes.

6. Cardiac musclesCardiac muscles
- Structure of Cardiac Tissue- Structure of Cardiac Tissue

7. Cardiac musclesCardiac muscles
- The types of tissue:
- Endocardium
- Myocardium
- Epicardium

8. Cardiac musclesCardiac muscles
•EndocardiumEndocardium
The The endocardiumendocardium is the is the smooth layesmooth layer of tissue that r of tissue that
lines the walls of the heart. It has a shiny surface that lines the walls of the heart. It has a shiny surface that
allows blood to flow freely.allows blood to flow freely.
EndocardiumEndocardium

9. Cardiac musclesCardiac muscles
•Myocardium
The myocardium is the thick, muscular, middle layer of
the heart. This layer is responsible for contracting the
heart and sending blood to the body tissues.
Myocardium

10. Cardiac musclesCardiac muscles
•Epicardium
The epicardium or outer layer is a thin layer that serves to
support in place and protect the heart.

11. Cardiac musclesCardiac muscles
Organ:Organ:
We can find cardiac muscles tissues in the We can find cardiac muscles tissues in the heartheart..

12. Cardiac muscleCardiac muscle
-The functions:The functions:
Pumping of blood through the heartPumping of blood through the heart: :
Alternate contraction and relaxation of cardiac Alternate contraction and relaxation of cardiac
muscle pumpsmuscle pumps

13. Cardiac musclesCardiac muscles
•Infectious Diseases of the HeartInfectious Diseases of the Heart
- Some infectious diseases cause inflammation of - Some infectious diseases cause inflammation of
one of the cardiac tissue layers, resulting in one of the cardiac tissue layers, resulting in
permanent heart damage. A virus or type of permanent heart damage. A virus or type of
bacteria typically causes these conditions.bacteria typically causes these conditions.

14. Skeletal muscle Skeletal muscle
tissuetissueSkeletal muscle tissue:Skeletal muscle tissue:
It’s a type of striated muscle that allows to doIt’s a type of striated muscle that allows to do
voluntary physical movements of all types.voluntary physical movements of all types.

15. Main types of cells:Main types of cells:
Skeletal tissue is mainly made up of Skeletal tissue is mainly made up of myocitesmyocites..
The cells that make up skeletal muscle tissue areThe cells that make up skeletal muscle tissue are
longlong and and fibrous.fibrous.


Myocyte
Skeletal Skeletal
muscle muscle
TissueTissue

16. Skeletalmuscle Skeletalmuscle
tissuetissueStructure of skeletal tissue:Structure of skeletal tissue:

17. Skeletal muscle Skeletal muscle
tissuetissue
We can find We can find
skeletal muscle skeletal muscle
tissue in the tissue in the
muscular muscular
system.system.

18. Skeletal muscle Skeletal muscle
tissuetissue
Functions of skeletal tissue:Functions of skeletal tissue:
-Skeletal tissue work in pairs to Skeletal tissue work in pairs to coordinatecoordinate the the
movementsmovements of the limbs, trunk, etc. of the limbs, trunk, etc.
- They are directly involved in - They are directly involved in breathing.breathing.

19. Skeletal muscle Skeletal muscle
tissuetissue
Diseases of the Diseases of the
skeletal muscle:skeletal muscle:
FibromyalgiaFibromyalgia is a is a
disorder that causes disorder that causes
muscle pain muscle pain and fatigue. and fatigue.
People with fibromyalgia People with fibromyalgia
have "have "tender tender
pointspoints" in the body." in the body.
Tender pointsTender points

20. Cardiac and skeletal muscle Cardiac and skeletal muscle
tissuetissue
•Questions:Questions:
1.1.What is the main difference between cardiac and What is the main difference between cardiac and
skeletal tissues?skeletal tissues?
-Cardiac tissues are involuntary Cardiac tissues are involuntary
and skeletal tissue is voluntary. and skeletal tissue is voluntary.
1.1.What is the main function of the cardiac muscle What is the main function of the cardiac muscle
tissue?tissue?
- Pumping blood through the - Pumping blood through the
heart.heart.