Exam (elaborations)
BIO 344 CH 18 Questions answers latest update
- Course
- Bio 344
- Institution
- University Of Texas - Austin
BIO 344 CH 18 Questions answers latest update
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BIO 344 CH 18Location of the heart
mediastinum
size of the heart
size of fist
Base of the heart
located superior, right
apex of the heart
located inferior, right
two parts of the pericardium
fibrous pericardium and serous pericardium
fibrous pericardium
- dense irregular CT
- anchors heart and prevents overstretching due to elastic fibers
serous pericardium
- parietal pericardium
- visceral pericardium
- pericardial cavity (pericardial fluid)
myocardium
- thickest layer made of cardiac muscle tissue
- striated and branching fibers
, - 12 nuclei per fiber
- contains intercalated discs with desmosomes and gap junctions
desmosomes
anchor adjacent cells
gap junctions
contain connexions and promote rapid spread of APs between adjacent cells
endocardium
endothelium (simple squamous epithelium), continuous with lining of blood
vessels and heart chambers
chambers of the heart
right atrium, right ventricle, left atrium, left ventricle
right atrium
- upper chamber of the heart
- right auricle
- four openings to right atrium
right auricle
- outward, pouch-like extensions of right atrium
- slightly increase volume of atrium
four openings to right atrium
1. superior vena cava
2. inferior vena cava
3. atrium/ventricle --> tricuspid valve
4. coronary sinus
heat associated valves
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