Download The Circulatory System

Kate ,Lily, and Alyssa
Right Side of the heart
When your heart beats it pushes blood out of the right ventricle to the lungs. The bloods cells that are
carried to the lungs release carbon dioxide and gain oxygen so that when you breath in you inhale
oxygen and when you exhale your lungs release carbon dioxide. Then the red blood cells take oxygen
from the air you breathe in and head to the left side of your heart.
Right Side of the Heart
Left Side of the Heart
The oxygen filled red blood cells go to the left side of the heart. Blood from the lungs goes to the left
atrium. When your heart beats again it squeezes blood into the left ventricle. When the left ventricle
contracts, it pumps blood through arteries to the body. The capillaries transport red blood cells
through the veins to the right side of the heart.
Left Side of the Heart
The Arteries and the Capillaries
Blood flows through smaller and smaller arteries, ending in different capillaries.
Capillaries are 1/100 of a millimeter in diameter. The capillaries touch every cell
in the body. Gas exchange happens while the red blood cells are sliding past
cells.
Red Blood Cells and White Blood
Cells: How they Work
Red Blood Cells
•Red blood cells (after the
respiratory system transports
oxygen to the red blood cells) gets
rid of carbon dioxide from your
body
•Red blood cells carry gases. They
carry important gas oxygen to the
cells and the waste gas carbon
dioxide away from the cells.
•Red blood cells get there food and
other resources from blood.
White Blood Cells
•White blood cells fight
infections to keep your body
healthy.
•There are five different types of
white bloods cells, however they
all fight infections and diseases.
•White blood cells live about 3-4
days in the average human’s body.
Lungs
The respiratory system has two main parts. They are the
lungs and the system of tubes that connect the lungs with
the outside air. When you breathe in, oxygen from the air
enters your lungs. Three billion air sacs in your lungs are
surrounded by capillaries.
True or False?
 There are more red blood cells in your body than any
other cell I your body.
 The average human body has 50,000 to 100,000 miles
of veins in your body.
 Red blood cells and white blood cells are the only cells
you have in your body.