Download The Heart

The
Heart
Heart Anatomy
May 4, 2017
Heart Anatomy
■ hollow muscular organ
■ surrounded by a
double-layered
protective sac called
the pericardium
May 4, 2017
Heart Anatomy
■ Acts as a double pump:
■ septum:
■
muscular wall separating the
right side (deoxygenated)
from the left side
(oxygenated)
right side
left side
May 4, 2017
lungs
(pulmonary subsystem)
body
(systemic subsystem)
&
(cardiac subsystem)
Heart Anatomy
Divided into 4 chambers:
■ 2 atria:
■ thin-walled upper
chambers
left atrium
right atrium
■ receive blood from
body via veins
■ send blood to the
ventricles
May 4, 2017
septum
Heart Anatomy
4 chambers: (continued)
■ 2 ventricles
■ thick-walled lower
chambers
left atrium
right atrium
■ receive blood from
atria
■ send blood to body via
arteries
right ventricle
septum
May 4, 2017
left ventricle
Heart Anatomy
2 sets of valves
1.atrioventricular valves (A-V)
■ between atria & ventricles
■ tricuspid (right)
left atrium
right atrium
■ bicuspid or mitral (left)
function:
A-V
■ prevent backflow (tricuspid)
into atria when
right ventricle
ventricles contract
septum
May 4, 2017
A-V
(bicuspid)
left ventricle
Heart Anatomy
2 sets of valves (continued) S-L
2.semilunar valves (S-L)
(aortic)
■ in arteries leaving
ventricles
right atrium
■ pulmonary S-L (right)
■ aortic S-L (left)
A-V
function:
(tricuspid)
■ prevent backflow
right ventricle
into ventricles
as the arteries snap back septum
May 4, 2017
S-L
(pulmonary)
left atrium
A-V
(bicuspid)
left ventricle
Heart Anatomy
Septum
May 4, 2017
Heart Anatomy
to upper body
right pulmonary artery
superior vena cava
aorta (aortic arch)
right pulmonary vein
left pulmonary artery
right atrium
pulmonary S-L valves
tricuspid A-V valves
inferior vena cava
left atrium
left pulmonary vein
aortic S-L valves
bicuspid/mitral valve
left ventricle
right ventricle
septum
dorsal aorta
(descending aorta)
May 4, 2017
Heart Anatomy
May 4, 2017
Heart Anatomy
myocardium =
• heart muscle
endocardium =
• inner lining of
the heart
May 4, 2017
Heart Anatomy – Cross Section
May 4, 2017
Heart Anatomy
Coronary
Artery & Vein
May 4, 2017
Heart Anatomy
aortic arch
right pulmonary artery
superior vena cava
right pulmonary veins
left pulmonary artery
left pulmonary veins
right atrium
left atrium
coronary veins
inferior vena cava
coronary arteries
left ventricle
right ventricle
dorsal aorta
May 4, 2017
Heart Anatomy
May 4, 2017
Homework
■ ‘Anatomy of the Heart’ worksheet
■ Page 263 # 1 – 3 (blue section)
■ Crossword Puzzle
May 4, 2017