Tissues of the Heart
Sammy Meilink
Gabby Avanzado
Michaela Karandziff
Colin Hopper
Cardiac Muscle Cells
• These cells are smaller than
muscle fibers
• They contain a single, central
nucleolus
• Contains myofibrils and
contraction – involves
shortening of individual
sarcomeres
• Dependent on aerobic
metabolism to obtain energy to
continue contracting
• There are reserves that store
energy as glycogen and lipids
Chordae Tendineae
• Blood travels from the right atrium to the right
ventricle through a broad opening bounded by
three flaps of fibrous tissue
– Part of the right atrioventricular – also known as
tricuspid
• Each cusp is braced by connective tissue fibers
Chordae Tendineae
http://www.google.com/imgres?q=chordae+tendineae&hl=en&safe=active&sa=X&rls=com.microsoft:en-us:IESearchBox&biw=1024&bih=600&tbm=isch&prmd=imvns&tbnid=Dr0sTllHS6ExFM:&imgrefurl=http://fyeahmedicine.tumblr.com/post/4089259037/white-coat-chordae-tendineae-in-theheart&docid=z6YbsE4M9_Zs7M&imgurl=http://24.media.tumblr.com/tumblr_limhrks6cE1qaqphpo1_500.jpg&w=500&h=401&ei=DUiET9zBBIL9QTB54TPCA&zoom=1&iact=hc&vpx=97&vpy=264&dur=2531&hovh=201&hovw=251&tx=142&ty=200&sig=113621735808706121368&page=1&tbnh=132&tbnw=169&start=0&ndsp=18&v
ed=1t:429,r:12,s:0,i:95
Papillary Muscle
• Chordae Tendineae is connected to the
papillary muscles
– Cone shaped projections on the inner surface of
the ventricle
Connective Tissue
• Abundant collagen and elastic fibers wrap
around cardiac muscle cells and tie together
adjacent cells
Three Functions
• Provide support for cardiac muscle fibers,
blood vessels, and nerves of myocardium
• Add strength and prevent overexpansion of
the heart
• Help the heart return to normal shape after
contractions
Layers of the Heart
• Intercalated discs interlock
membranes of adjacent
cells by desmosomes and
linked by gapped junctions
• They convey the force of
contraction from cell to cell
• Provide movement of ions
and small molecules
Layers of the Heart cont.
• Epicardium covers the
outer surface of the
heart
• Myocardium contains
cardiac muscle tissue,
blood vessels and
nerves
• Endocardium a simple
squamous epithelium
that is continuous
Vocabulary
• Intercalated discs: Each cardiac muscle cell is in contact
with several others at specialized sites
• Desmosomes: The cell membranes of two cells are
locked together by intercellular cement and by
membrane proteins connected to a network of
intermediate filaments
– Intercellular cement: Is a protein-polysaccharide mixture
• Myofibrils: Organized collections of myofilaments in
skeletal and cardiac muscle cells
– Myofilaments: Protein filament consisting of the proteins
actin and myosin
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Work Cited
Slide Two Pic:
http://www.google.com/imgres?q=cardiac+muscle+cell&hl=en&sa=X&qscrl=1&nord=1&rlz=1T4ACEW_enUS378US379&biw=624&bih=889&tbm=isc
h&prmd=imvns&tbnid=FfPmAz7AcnaRM:&imgrefurl=http://histologyolm.stevegallik.org/node/146&docid=K2HQhrvAF7pWnM&imgurl=http://stevegallik.org/sites/histologyolm.stevegall
ik.org/images/cardiacmuscle.jpg&w=600&h=471&ei=DMCGT_GNO4my2QXfqvDlCA&zoom=1&iact=rc&dur=1&sig=116640695688943885148&page
=2&tbnh=151&tbnw=192&start=12&ndsp=15&ved=1t:429,r:2,s:12,i:146&tx=113&ty=99
Slide Four Pic: http://www.google.com/imgres?q=chordae+tendineae&hl=en&safe=active&sa=X&rls=com.microsoft:en-us:IESearchBox&biw=1024&bih=600&tbm=isch&prmd=imvns&tbnid=Dr0sTllHS6ExFM:&imgrefurl=http://fyeahmedicine.tumblr.com/post/4089259037/
white-coat-chordae-tendineae-in-theheart&docid=z6YbsE4M9_Zs7M&imgurl=http://24.media.tumblr.com/tumblr_limhrks6cE1qaqphpo1_500.jpg&w=500&h=401&ei=DUiET9zBBIL9QTB54TPCA&zoom=1&iact=hc&vpx=97&vpy=264&dur=2531&hovh=201&hovw=251&tx=142&ty=200&sig=113621735808706121368&page=1&tb
nh=132&tbnw=169&start=0&ndsp=18&ved=1t:429,r:12,s:0,i:95
Slide Five Pic:
http://www.google.com/imgres?q=papillary+muscle&hl=en&sa=X&qscrl=1&nord=1&rlz=1T4ACEW_enUS378US379&biw=624&bih=889&tbm=isch&
prmd=imvns&tbnid=yEOe3S5LZp4fSM:&imgrefurl=http://cardiacsurgeryacademy.org/Structure-of-different-heartValves.html&docid=02cjwJB5f40eUM&imgurl=http://98.131.235.9/images/Anatomy-of-cardiacvalves.jpg&w=423&h=301&ei=esCGT6mjEca22gWMk9mRCQ&zoom=1&iact=rc&dur=1&sig=116640695688943885148&page=2&tbnh=164&tbnw=2
46&start=12&ndsp=15&ved=1t:429,r:5,s:12,i:113&tx=172&ty=74
Slide Six Pic:
http://www.google.com/imgres?q=connective+tissue+in+the+heart&hl=en&sa=X&qscrl=1&nord=1&rlz=1T4ACEW_enUS378US379&biw=624&bih=8
89&tbm=isch&prmd=imvns&tbnid=fN-hD8j8ObctmM:&imgrefurl=http://www.ouhsc.edu/histology/text%2520sections/cardiovascular.html&docid=LqB6Z6kXvu4DM&imgurl=http://www.ouhsc.edu/histology/Glass%252520slides/78_07.jpg&w=400&h=314&ei=RcGGTjxEsmw2QXsvKjnCA&zoom=1&iact=rc&dur=1&sig=116640695688943885148&page=1&tbnh=152&tbnw=194&start=0&ndsp=12&ved=1t:429,r:1,s:0
,i:71&tx=65&ty=53
Slide Eight Pic:
http://www.google.com/imgres?q=intercalated+discs&hl=en&sa=X&qscrl=1&nord=1&rlz=1T4ACEW_enUS378US379&biw=624&bih=889&tbm=isch
&prmd=imvns&tbnid=hwZkCLFyMOBjnM:&imgrefurl=http://neuromedia.neurobio.ucla.edu/campbell/muscle/wp.htm&docid=aGj76SZpDlm6sM&im
gurl=http://neuromedia.neurobio.ucla.edu/campbell/muscle/wp_images/17_intercalated_disk.gif&w=640&h=512&ei=lcGGT7jPIeOS2QW6t7DlCA&z
oom=1&iact=rc&dur=120&sig=116640695688943885148&page=1&tbnh=142&tbnw=178&start=0&ndsp=13&ved=1t:429,r:11,s:0,i:147&tx=104&ty
=62
Slide Nine Pic:
http://www.google.com/imgres?q=layers+of+the+heart&hl=en&sa=X&qscrl=1&nord=1&rlz=1T4ACEW_enUS378US379&biw=624&bih=889&tbm=isc
h&prmd=imvns&tbnid=AEs0HCYB5VH2BM:&imgrefurl=http://www.scienceart.com/image/%3Fid%3D3885%26m%3D154&docid=VQ0LiuKTJNiZzM&imgurl=http://www.scienceart.com/gallery/154/154_31920092831.jpg&w=405&h=321&ei=6MGGT_WSDajO2gX6vZyJCQ&zoom=1&iact=hc&vpx=2&vpy=130&dur=537&hovh=
200&hovw=252&tx=171&ty=110&sig=116640695688943885148&page=2&tbnh=148&tbnw=187&start=12&ndsp=17&ved=1t:429,r:3,s:12,i:175
Essentials of Human Anatomy by Bartholemez