The Heart
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Heart location | Thoracic cavity, 2/3 left, inside mediastinum
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| Apex | Inferior, anterior, and left
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| Base | Superior, posterior, right
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| Functions of heart | pump blood through vessels, and produce horomones
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| How many layers does pericardium have? | Three: fibrous pericardium, serous pericardium parietal layer, serous pericardium visceral layer
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| Fibrous pericardium | Dense irr. c.t. attached to diaphragm and large blood vessels, not elastic
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| Serous pericardium parietal layer | attached to fibrous pericardium
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| Serous pericardium visceral layer | attached to surface of the heart
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| Pericardial fluid function | To decrease friction during heartbeat
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| What is between layers of the heart? | Pericarial fluid
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| Myocardium | Cardiac muscle cells, joined by intercalated disks
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| Endocardium | Inner lining of heart made up of epithelial tissue and c.t. that seperates blood from muscle
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| Right atrium | Recieves blood from body
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| Left atrium | Recieves blood from lungs
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| Auricle | Pouch near top of atria to increase volume
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| Pectinate Muscle | Ridgid walls especially in auricles
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| Sinoatrial node | Special bundle of modified cardiac cells "pacemaker"
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| Trabeculae carneae | Ridges of muscle in the ventricles
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| Chordae tendineae | Tendon-like cords that attach to bottoms of bicuspid and tricuspid valves and then to the papillary muscles
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| When moving blood from atria to ventricles | AV valve open and SL valves closed
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| Moving blood from ventricles to body | AV valves close and SL valves open
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| Coronary artery | Artery that carries blood to cardiac cells
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Created by:
Kayerenee
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