Powerpoint Presentation by Aswathy AR

Double Circulation

1. CIRCULATION
OF BLOOD

2. INRODUCTION
Circulation
The circulatory system is an organ 
system that permits blood to circulate 
and transport nutrients, oxygen, carbon 
dioxide, hormones, and blood cells to 
and from cells in the body to nourish it 
and help to fight diseases, stabilize body 
temperature and pH, and to 
maintain homeostasis.

3. BLOOD
Blood circulates through the body 
Blood carries nutrients (food) ,oxygen 
and many other substances  to all 
cells of the body 
It carries away waste products 
without access to the blood, cells and 
body tissues die 

4. CIRCULATORY SYSTEM
Heart
Arterioles
Veins
Venules
Capillaries
Arteres
Blood

5. THE MAIN FEATURES OF
CIRCULATION
To transport
Nutrients
Wastes
Oxygen and Carbon dioxide
Hormones

6. THE DIFFERENT TYPES OF
CIRCULATIONS
1. Single circulation
2. Duble circulation

7. SINGLE CIRCULATION
 Single Circulation has only one circuit - the
heart has only one chamber and 2 pumps
The heart has pump blood through only one
direction
Eg: Fish

8. DOUBLE CIRCULATION
Duble circulation has tow different circuits
One for oxygenated blood and the other for de
oxygenated blood
Eg: Human heart

9. Duble circulation
In duble circulationthe blood circulates twice,
once for oxygenated blood and the other for
deoxygenated blood.

10. DUBLE CIRCULATION
Pulmonary circulation
Heart- Lung
Systemic circulation
Heart- Tissue capillaries

11. DOUBLE CIRCULATION IN
HUMANS
Heart Blood
Blood
vessels
Circulatory
system

12. HOW IT IS WORK?
Lung
All other parts
of the body
The mammalian The mammalian
circulation plancirculation plan pulmonary
circulation
systemic
circulation
As blood
passes
through
heart twice,
this also
known as
double
circulation

13. THE PULMONARY CIRCULATION
2The
Deoxygenated
blood is pumped
through
pulmonary artery.
3The blood
becomes
oxygenate
d
4The
Oxygenated
blood flows
through
pulmonary
veins to left
auricle
1.Deoxyge
nated
blood in
right
ventricle

14. Lung capillaries
absorbs oxygen and loses
carbon dioxide
Oxygen-rich blood
Pulmonary veins
carry oxygen-rich blood

15. THE SYSTEMIC CIRCULATION
The human circulatory system
1.Oxygenate
d blood in
left
ventricle
2The
oxegenated
blood is
pumped
through aorta
to all parts of
the body
except lungs
3O
2
and
nutrients
diffuse into
cells while
CO
2
and
wastes
diffuse out
4The blood
flows through
inferior/
superior vena
cava to right
auricle

16. Oxygen-rich blood
returns to the heart
through pulmonary
veins
Left ventricle pushes
the blood out through
the main artery, the
aorta

17. CAUSES OF IMPAIRED
BLOOD CIRCULATION
Impaired or poor
blood circulation
result of age,
lifestyle or disease,
accumulation of free
radicals

18. Lack of oxygen reduces the energy level
in cells and waste products accumulate in
both muscles and connective tissue.
Pain and other illness may occur in several
places in the body.

19. SIGNS OF IMPAIRED BLOOD
CIRCULATION
Pain while walking
 Muscle cramps (common at night)
 Cold hands and feet
 Restless legs
 Swollen legs and feet
 Slow healing of injuries/ wounds
 Myocardial infarction (heart attack)
 Stroke

20. MEASUREMENT OF BLOOD
CIRCULATION
even when the blood
pressure is normal,
blood circulation may
be seriously impaired!
awareness of the causes
and effects of poor
blood circulation is
very important

21. ADVANTAGES OF DOUBLE
CIRCULATION
In humans the blood pressure can be increased after it
has left the lungs. It is faster. Humans are more active
and need to produce more energy and heat.

22. DISADVANTAGES OF DOUBLE
CIRCULATION
Double circulation is much more efficient than single.
Oxygenated and Deoxygenated blood exchange takes
place at one time in our body.

23. CONCLUSION
In our body the blood circulates twice, once the
pure(oxygenated) blood is pumped by the left
ventricle to the other parts of the body and
comes back to the heart at the right auricle(one
circulation complete), secondly the blood from
the right ventricle is pumped to the heart for
purification and comes back to heart at the left
auricle (this is second circulation). This is called
double circulation.

24. THE END