Transcript Circulatory System

Circulatory
System
Circulation Video
D. Label the parts of the circulatory system
Superior Vena Cava
Red = Oxygenated
Blue = Deoxygenated
E. Follow the path of a blood cell through the circulatory system
Circulatory System
• Circulatory System is
a closed circuit path
• Blood cells follow
this path over, and
over, and over again
E. Follow the path of a blood cell through the circulatory system
Follow the Circulatory System
• 1-Capillary:
– Thin walled blood
vessels
– Site of gas exchange
– Microscopic in size
– Every inch of your body
is covered in hundreds
of capillaries
E. Follow the path of a blood cell through the circulatory system
Follow the Circulatory System
• 2-Vein:
–Pathway of blood headed BACK
to the heart
–Always deoxygenated
Small Veins are
called Venules
E. Follow the path of a blood cell through the circulatory system
Follow the Circulatory System
• 3-Superior/Inferior
Vena Cava
–Where blood ENTERS
heart
E. Follow the path of a blood cell through the circulatory system
Follow the Circulatory System
• 4-Right Atrium
–1st Chamber of the
heart
E. Follow the path of a blood cell through the circulatory system
Follow the Circulatory System
• 5-Tricuspid Valve
–Thin walled blood vessels
–Site of gas exchange
–Microscopic in size
–Every inch of your body
is covered in hundreds of
capillaries
E. Follow the path of a blood cell through the circulatory system
Follow the Circulatory System
• 6-Purkinje Fibers
–Prevent backflow of
blood
E. Follow the path of a blood cell through the circulatory system
Follow the Circulatory System
• 7-Right Ventricle
–2nd Chamber of heart
E. Follow the path of a blood cell through the circulatory system
Follow the Circulatory System
• 8-Semilunar Valve
–Deoxygenated blood
LEAVES the heart
through this valve
E. Follow the path of a blood cell through the circulatory system
Follow the Circulatory System
• 9-Lungs
–Blood is oxygenated by
lungs
– Oxygen exchange takes
place by passing from the
alveoli (respiratory system) to
the capillaries (circulatory
system)
E. Follow the path of a blood cell through the circulatory system
Follow the Circulatory System
• 10-Left Atrium
Left
Atrium
–3rd Chamber
–OXYGENATED
blood re enters
the heart
E. Follow the path of a blood cell through the circulatory system
Follow the Circulatory System
• 11-Mitral Valve
–Valve between LEFT
atrium & ventricle
Left Atrium
Mitral Valve
Named because it
looks like a Miter’s hat
E. Follow the path of a blood cell through the circulatory system
Follow the Circulatory System
• 12-Left Ventricle
–Last (4th) chamber
of the heart before
blood leaves the
heart through
arteries
Left Ventricle
E. Follow the path of a blood cell through the circulatory system
Follow the Circulatory System
• 13-Arteries
–LARGE Blood
passageways that
take OXYGENATED
blood AWAY from
the heart
E. Follow the path of a blood cell through the circulatory system
Follow the Circulatory System
• Capillaries (again)
–Here is where the
process starts all
over
–Junction between
arteries and veins
•
Trivia Question:
Which species of animal has a “second
heart?”
The frog is an important part of the horse's
circulatory system — it pumps blood up the
horse's leg each time the frog makes contact
with the ground. The blood flows down the
horse's leg into the digital cushion, a fibrous
part of the inner hoof located just above the
frog which contains a network of blood
vessels. The horse's weight then compresses
the frog on the ground, squeezing the blood
out of the digital cushion, and pushing it back
up the horse's legs.