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Circulatory System - Jordan Smith
Transcript of Circulatory System - Jordan Smith
The Circulatory System
By Jordan, Marissa, and Alexa
The system is an organ system that allows blood and lymph circulation
What Exactly is it?
is like a
Around and around
The circulatory system is very important because it is responsible for transporting materials throughout the body
The picture on the left shows red blood cells moving throughout the body
The Circulatory System
Is VERY VERY
The System permits blood circulation throughout the body. This is so that nutrients and other materials are able to be transported.
If blood circulation did not occur water and oxygen would not be able to come into our bodies, and carbon dioxide wouldn't be able to leave.
These materials are sent around the body to form cells.
And these cells that are formed can help fight disease and stabilize body temperature.
Main Parts of the System!
The system is divided into four main parts;
The heart: which is a hallow muscular organ that pumps blood throughout the circulatory system
The Human Heart
Now everyone try to label
your diagram that was included with the handout. The terms needed are: Heart, Veins, Aorta, Capillaries, Artery
Lets learn about Arteries, Veins and Capillaries
An artery is an elastic blood vessel that transports blood away from the heart
The types of arteries;
They carry blood from the heart into the lungs where the blood picks up oxygen. The oxygen and rich blood are than returned to the heart.
They deliver blood to the rest of the body
Arteries are tubes composed of three layers. The three layers are;
Tunica adventitia - It is the strong outer layer, and it is composed of connective tissue, and elastic fibers.
Tunica Media - The middle layer of the walls of arteries. It is made up out of smooth muscle and elastic fibers.
Tunica Intima - The inner layer, It is composed of elastic membrane and smooth endothelium.
A vein is an elastic blood vessel that transports blood. Most veins transport de-oxygenated blood into the heart from the rest of the body except for the pulmonary vein (This brings oxygenated blood from the lungs to the heart).
The Structure of the veins is very similar to the structure of the arteries
Are where oxygen and other nutrients in the blood are actually delivered to the tissues of the body. They are so small that substances actually pass right through them (This process is also known as diffusion).
Have very thin walls made up of endothelial cells this allows substances to move through the wall with ease.
They are very small 5-10 micro meters in width
Their size allows for fast and efficient transfer of oxygen-carrying red blood cells to the site where they are needed.
The Relationship between the three
Arteries, Capillaries, and Veins are all blood vessels of the body and channels for the blood
Components of Blood
The blood that passes through the system contains;
White Blood Cells
Red Blood Cells
The song :)
Most common disorder found in the system (known as hardening of the arteries)
Happens when fat, cholesterol and other substances build up in the artery walls
The buildups form plaques that can actually block the arteries
Can lead too; heart attacks, and strokes
The picture on the right shows the
build up of the disorder
Two quick Facts
1. If you attached all the veins, capillaries, and arteries in your body it would = a length of 60,000 miles!
2. One drop of blood contains a half a drop of plasma, 5 million red blood cells, 10 thousand white blood cells, and 250 thousand platelets!