Download Figure 19.4E Gross anatomy of the heart

Figure 19.4E Gross anatomy of the heart
RIGHT
LEFT
A VERY STRONG MUSCLE!
Chambers of the heart
blue=CO2, red =O2
Enters from body. Blood is
deoxygenated, but has
carbon dioxide.
Right Atrium
Valve
Right Ventricle
Valve
Goes to lungs. Drops off
carbon dioxide and picks
up oxygen.
Comes back from lungs with oxygen
Left Atrium
Valve
Left Ventricle
Valve
Goes out to the body with oxygen.
Drops of oxygen and picks up carbon
dioxide
Figure 20.17A Pulmonary circulation
Figure 19.5 Systemic & pulmonary circuits
Blood from body enters
Right Atrium
Right Ventricle sends blood
to lungs
Blood from lungs enters
Left Atrium
Left Ventricle sends blood
to rest of body
Arteries carry
blood AWAY
from the heart
Veins carry blood
to the heart
(like ven in Spanish)
Septumseparates 2
sides of the
heart
Mrs. Workman’s research!
N1WT/WT
A.
E18.5
H&E
B.
E16.5
C.
N1ΔFC/ΔF
C
Misformed valves!
N1WT/WT
N1ΔFC/ΔFC
Figure 19.6 Anatomical differences in the right & left ventricles
Why is the left
ventricle so
much thicker
than the right
ventricle?
Valves
• Prevent back flow
• Between atria and ventricle-open when
pressure increases due to a lot of blood in
atria
• Below ventricle-opens when ventricle
contracts, pushing blood out through
valve.
• Slamming shut makes your heart beat.
• What is a pulse?
Figure 19.10A Operation of semilunar valves
Figure 19.10B Operation of semilunar valves
Circulatory system
• Works closely with
system
to bring oxygen from the lungs to the
muscles and carbon dioxide from the
muscles to the lungs to expel.
Blood Vessels
• Arteries-move blood AWAY from the heart. Thicker walls
because more pressure.
• Vein-moves blood towards the heart. Thinner walls
because less pressure. Valves to prevent back flow.
More on Blood Vessels
• Capillaries-small blood vessels where gas
exchange via diffusion takes place.
Components of Blood
Component
Red blood cells
Function
Transport oxygen and
carbon dioxide
White blood cells
Produce antibodies and
destroy invaders-immunity
Platelets
For blood clotting
Plasma-liquid
Carrying other materials, pH
buffering, etc