"Slide 16" Capillaries of head and Superior vena cava forelimbs Pulmonary artery Pulmonary artery Capillaries of right lung Aorta Capillaries of left lung Pulmonary vein Pulmonary vein Right atrium Left atrium Right ventricle 'Left ventricle Inferior Aorta vena cava Capillaries of abdominal organs and hind limbs "Slide 21" Pulmonary artery Aorta Pulmonary artery Right Left atrium atrium Semilunar valve Semilunar valve Atrioventricular Atrioventricular valve valve Left Right ventricle ventricle "Slide 25" 1 Pacemaker 2 Signals are delayed at AV node. 3 Signals pass to heart apex. 4 Signals spread throughout generates wave of signals to contract. ventricles. SA node (pacemaker) AV node Bundle Purkinje fibers Heart branches арех ECG

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Describe all the events (steps) that occur during a cardiac cycle for mammals (organisms with a double circulation). Please include in your description all the steps illustrated in slide #16 of the Cardiovascular System PowerPoint presentation (Lectures 5&6), as well as the opening and closing of all heart valves (refer to slide #21), and the signals arising from the SA and AV nodes (shown in slide #25). How does this cycle contribute to metabolic homeostasis for our cells, and what is the purpose of the valves?

"Slide 16"
Capillaries of
head and
Superior
vena cava
forelimbs
Pulmonary
artery
Pulmonary
artery
Capillaries
of right lung
Aorta
Capillaries
of left lung
Pulmonary
vein
Pulmonary
vein
Right atrium
Left atrium
Right ventricle
'Left ventricle
Inferior
Aorta
vena cava
Capillaries of
abdominal organs
and hind limbs
Transcribed Image Text:"Slide 16" Capillaries of head and Superior vena cava forelimbs Pulmonary artery Pulmonary artery Capillaries of right lung Aorta Capillaries of left lung Pulmonary vein Pulmonary vein Right atrium Left atrium Right ventricle 'Left ventricle Inferior Aorta vena cava Capillaries of abdominal organs and hind limbs
"Slide 21"
Pulmonary artery
Aorta
Pulmonary
artery
Right
Left
atrium
atrium
Semilunar
valve
Semilunar
valve
Atrioventricular
Atrioventricular
valve
valve
Left
Right
ventricle
ventricle
"Slide 25"
1 Pacemaker
2 Signals are
delayed at
AV node.
3 Signals pass
to heart apex.
4 Signals spread
throughout
generates wave of
signals to contract.
ventricles.
SA node
(pacemaker)
AV
node
Bundle
Purkinje
fibers
Heart
branches
арех
ECG
Transcribed Image Text:"Slide 21" Pulmonary artery Aorta Pulmonary artery Right Left atrium atrium Semilunar valve Semilunar valve Atrioventricular Atrioventricular valve valve Left Right ventricle ventricle "Slide 25" 1 Pacemaker 2 Signals are delayed at AV node. 3 Signals pass to heart apex. 4 Signals spread throughout generates wave of signals to contract. ventricles. SA node (pacemaker) AV node Bundle Purkinje fibers Heart branches арех ECG
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