Cardiac and Cardiac and skeletal musclesskeletal muscles

Cardiac muscles:  is a type of involuntaryStriated muscle found in the walls of theheart specially in the myocardium.

Myocardium

Cardiac musclesCardiac musclesMain 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.

Cardiac musclesCardiac musclesMain 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

Cardiac musclesCardiac musclesStructure 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.

Cardiac musclesCardiac muscles- Structure of Cardiac Tissue- Structure of Cardiac Tissue

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

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

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

Cardiac musclesCardiac muscles• Epicardium The epicardium or outer layer is a thin layer that serves to

support in place and protect the heart.

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

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

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.

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 dovoluntary physical movements of all types.voluntary physical movements of all types.

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 arelonglong and and fibrous.fibrous.

Myocyte

Skeletal Skeletal muscle muscle TissueTissue

Skeletalmuscle Skeletalmuscle tissuetissueStructure of skeletal tissue:Structure of skeletal tissue:

Skeletal muscle Skeletal muscle tissuetissueWe can find We can find

skeletal muscle skeletal muscle tissue in the tissue in the muscular muscular system.system.

Skeletal muscle Skeletal muscle tissuetissueFunctions of skeletal tissue:Functions of skeletal tissue:

- Skeletal tissue work in pairs to Skeletal tissue work in pairs to coordinatecoordinate the themovementsmovements of the limbs, trunk, etc. of the limbs, trunk, etc.- They are directly involved in - They are directly involved in breathing.breathing.

Skeletal muscle Skeletal muscle tissuetissueDiseases 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

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.