X A&P - Chp 14 - The Heart and Heart Disease Flashcards
Myo
Muscle
Peri
Around
Septum
Wall
Stenosis
narrowing of the spinal column that causes pressure on the spinal cord
tachycardia
faster than normal heartrate (100 bpm or higher)
bradycardia
slow heartbeat
60 bpm or slower
Heart is located in the M…
Mediastinum (behind the sternum)
Portion of Aorta above Abdomen
Thoracic Aorta
Portion of Aorta below Abdomen
Abdominal Aorta
Layers of Heart (see image)
- Endocardium (smooth like teflon)
- Myocardium (muscle)
- Epicardium aka Serous Pericardium aka Visceral Pericardium (touches heart directly, thin outermost layer)
Parietal Pericardium
Outermost later of Pericardium (see balloon fist image)
Structure of Pericardium
- Outer fibrous pericardium
- Serous pericardium (parietal layer fused to pericardium, Visceral later, fused to myocardium)
Features of Myorcardium
- striated (actin, myosin)
- single cell nucleus
- involuntary
- intercalated discs
- branching muscle fibers
CABG test
Coronary Artery Bypass Graft test
Heart: Right side pumps ?
blood low in oxygen to lungs (via pulmonary circuit)
Heart: Left side pumps ?
Oxygenated blood to body (via systemic circuit)
4 chambers of heart
R and L Atria
R and L ventricle
Right Atrium
receives low O blood returning from body through superior and inferior vena cava
Right Ventricle
pumps blood from right atrium to lungs
Left Atrium
received high O blood from lungs