Download - The circulatory system
The circulatory system
Circulatory system
• The circulatory system is made up of your heart and blood vessels.
• The heart pumps blood to all areas of your body.
• The blood carries oxygen and nutrients to your body
The heart
• The heart is a muscular organ inside the rib cage, between the lungs.
• It’s about the size of your fist (closed hand)
But the heart muscle is special because of what it does.
• The heart sends blood around your body.
• The blood provides your body with the oxygen and nutrients it needs.
• It also carries away waste.
Heart Parts
• The heart is made up of four different areas, and each of these areas is called a chamber.
• There are two chambers on each side of the heart. One chamber is on the top and one chamber is on the bottom.
Chambers
Chambers
• The two chambers on top are called the atrium .
• The heart has a left atrium and a right atrium.
• The two chambers on the bottom are called the ventricles.
• The heart has a left ventricle and a right ventricle.
LeftAtrium
RightAtrium
LeftventricleRight
ventricle
Septum
• Running down the middle of the heart is a thick wall of muscle called the septum.
• The septum's job is to separate the left side and the right side of the heart.
Septum
Blood
• The blood moves through many tubes called arteries, veins and capillaries.
• Which together are called blood vessels.
Blood vessels
• These blood vessels are attached to the heart.
• The blood vessels that carry blood away from the heart are called arteries.
• The ones that carry blood back to the heart are called veins.
• The tiny blood vessels that connect the smallest arteries to the smallest veins are called capillaries.
Blood vessels types
Arteries
Veins
Capillaries
Blood
• Blood is a red liquid that flows through blood vessels.
• Blood contains liquid plasma and solid blood cells.
• There are three types of blood cells:
• Red blood cells• White blood cells and• Platelest.
Blood composition
• Platelets help to form a solid clot when there is a cut in a blood vessel.
• Red blood cells carry oxygen. They can also carry some carbon dioxide.
• White blood cells fight infections in the body.
Circulatory system video
• http://youtu.be/oE8tGkP5_tc
CEIP San Miguel Arcángel
Year 6th. 2013