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Human Circulation System
Transcript of Human Circulation System
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Human circulatory system is a system to transport
all of body parts.
Human circulatory system includes in closed circulation
system, it means that the blood flows
Our heart is located between lungs, in the middle of the chest, behind the breastbone (sternum). A double-layered membrane called the
that surrounds our heart.
* transporting oxygen to cells
* transporting nutrients from the digestive system to body cells
* transporting hormones to body cells
* transporting waste from body cells to excretory organs
The heart weight is 7 until 15 ounces.
Throughout human life, human heart beat (contracts and relaxs) more than 3,5 billion times.
The size is little larger than the size of our fist.
Pumping about 2,000 gallons (7,571 liters) of blood per day.
about heart is :
to beat as long as we live.
ow does this system
Human circulatory system works like
in our house.
Do you know the
This tool will pull water from the ground. After water is pulled up, it pushes the water to flow in pipes.
The pipe has function as a channel for water flow. Water flows inside the pipe, so water can move into the destination place like bathroom.
The purpose of using water pump is to push water into the places like bathroom, kitchen or garden. Water is needed by human activity, like :
Like water pump, human circulatory system has
Heart functions to
the blood to all of our body parts. The heart has muscle which works unconsciously.
Blood is one of important parts of human body. Blood is like water in water pump mechanism. It is pumped to all body parts.
Blood is also called as a "vehicle" in body transportation, because blood
oxygen and nutrients
for cells. Blood also can
human body from microorganisms or foreign objects.
A blood vessel is like the pipe in a water pump. The function of blood vessels is a channel of blood cells to go to all of body parts. Blood vessels are divided into three kinds;
These two chambers have
You know why?
how the heart beat.
must pump blood to lungs (right ventricle)
and all of body parts (left ventricle).
just receive the blood from cava vein (right atria)
and pulmonary vein (left atria), so they don't need
thick wall like ventricles have.
Blood vessels are divided into three kinds.
Blood from heart
Blood to heart
are divided into three kinds
Do you know the main difference of
Arteries don't have valves.
Veins have valves.
Composition of blood :
(Sugar, protein, hormones etc)
Blood is a specialized body fluid that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste to excretory organs.
What actually blood is?
is so important?
Blood is very important because of its
* blood carries oxygen from lungs to cells.
* blood carries digested food products (nutrients).
from the intestines to the cells.
* blood carries wastes from the cells to the liver
* blood carries hormones to all of the body.
Blood as "vehicle" for transportation, means :
Body's immune system in blood
bacteria, fungi and viruses that may infect the body.
Sometimes tear occurs in a blood vessel, for example when we get cut. Blood will leak out and infections may occur.
that such tear must be repaired quickly. The blood does this by forming a clot that seal the wound.
How does the blood circulate in our body?
circulating blood to our
circulating blood to our
Blood which is rich oxygen is transported through aorta. From aorta, blood goes to capilleries through artery and arteriola. This oxygen is transported to all of body cells. Blood also carries nutrient and hormone for cells.
Now, blood rich CO and lack of O . Blood regenerates again in the heart. Blood go to right atrium through veins and then cava veins.
In body tissue, there is an gass exchange process. Blood release O to cells and receives CO from cells. Vice versa, cells release CO and receive O from bloods. Other nutrient which is brought by blood is also sent here.
Blood goes to lungs through pulmonary arteries.
Blood which is rich of CO is pumped from the right atrium to the right ventricle. When contraction, the right ventricle pushed the blood to the lungs.
Now, blood which is rich of O is back to heart through pulmonary veins. This O is transported to all of body cells.
Lungs have two parts, right and left sides. Each side contains hundreds of bronchioles, as branches of bronchi.
Each bronchiole is attached by hundreds of bubbles called alveoli.
In this part, the exchange of gasses happens. O bounded by haemoglobin and CO is released out side the lungs.
Blood from lungs enters to the left atrium to be pumped into the left ventricle. When contraction, the ventricle pumps blood into aorta.
There is two kinds of circulation in our body :
Drs J. Djoko Budiono, M.Si
Dr. Raharjo, M.Si
Ask question if you don't understand.
"Let's sing a song to remember our learning today"
(Heart as the pump)
(Blood vessels as pipes)
(Blood as liquid)
"Growing with character"
A human has 4 chambers.
Time Alocation :
Learning Objective :
1. Explain the organs that make up the human circulatory
system at least two organ pieces.
2. Explain the structure of blood and its functions.
3. Describes the flow of large and small blood circulation.
4. Distinguish large and small Circulatory system.
5. Mention at least three kinds of abnormalities in all three
organs in the human circulatory system and how to
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