Презентація на тему «Circulatory System»

Circulatory System
By Shevchenko Taras
m.II-25

The circulatory system carries blood and dissolved
substances to and from different places in the body.
The Heart has the job of pumping these things around
the body.
The Heart pumps blood and substances around the
body in tubes called blood vessels.
The Heart and blood vessels together make up the
Circulatory System.
What is the circulatory system?

lungs
head & arms
liver
digestive system
kidneys
legs
pulmonary artery
aorta
pulmonary vein
main vein
Left
Right
How does this system work?
Circulatory System

Lungs
Body cells
Our circulatory system is a double circulatory system.
This means it has two parts.
the right side of the system
deals with deoxygenated blood.
the left side of the system
deals with oxygenated blood.

The Heart
These are arteries. They carry blood away from the heart.
This is a vein. It brings blood from the body, except the lungs.
Coronary arteries, the hearts own blood supply
The heart has four chambers
2 atria
2 ventricles
now lets look inside the heart

The Heart
These are arteries. They carry blood away from the heart.
This is a vein. It brings blood from the body, except the lungs.
Coronary arteries, the hearts own blood supply
The heart has four chambers
2 atria
2 ventricles
now lets look inside the heart

The Heart
Left Ventricle
Left Atrium
Right Atrium
Right Ventricle
valve
Vein from Lungs
Artery to Head and Body
Artery to Lungs
Vein from Head and Body
valve

How does the Heart work?
blood from the body
blood from the lungs
The heart beat begins when the
heart muscles relax and blood
flows into the atria.
STEP ONE

The atria then contract and
the valves open to allow blood
into the ventricles.
How does the Heart work?
STEP TWO

How does the Heart work?
The valves close to stop blood
flowing backwards.
The ventricles contract forcing
the blood to leave the heart.
At the same time, the atria are
relaxing and once again filling with
blood.
The cycle then repeats itself.
STEP THREE

blood from the heart gets around
the body through blood vessels
There are 3 types of blood vessels
a. ARTERY
b. VEIN
c. CAPILLARY

what's in
red blood cells
white blood cells
platelets
plasma
carbon dioxide
digested food
waste (urea)
hormones
oxygen
BLOOD

The Blood
plasma
red blood cell
white blood cell
platelets

Red Blood Cells
contain haemoglobin, a molecule specially designed to hold oxygen and carry it to cells that need it.
can change shape to an amazing extent, without breaking.
a biconcave disc that is round and flat without a nucleus

White Blood Cells
there are many different types and all contain a big nucleus.
the two main ones are the lymphocytes and the macrophages.
some lymphocytes fight disease by making antibodies.
other lymphocytes make antitoxins to break down poisons.
macrophages ‘eat' and digest micro-organisms .

Platelets
Platelets are bits of cell broken off larger cells.
Platelets produce tiny fibrinogen fibres to form a net. This net traps other blood cells to form a blood clot.

Thank you for attention !