Blood Flow: Circulatory System
red blood cells (the transporters)
pick up the oxygen in the lungs, transport it to all the body cells, given carbon dioxide in return and carry it back to the lungs
left ventricle
pumps oxygen-rich blood to the body
right atrium
receives oxygen-poor blood from the body
veins
carry carbon-dioxide filled/deoxygenated blood back to the heart, which pumps it back to the lungs
atriums
collect/recieve the blood
left atrium
collects oxygen-rich blood from the lungs
ventricles
do the work by pumping the blood
arteries
generally larger blood vessels that carry oxygen rich blood away from the heart to your muscles and other body cells so that they have the energy to be used
the heart
-beats about 3 BILLION times during an average lifetime (beginning 6 months before you are born -a muscle the size of your fist -job is to pump the blood and keep the blood moving throughout your body -4 chambers: 1) left atrium 2) left ventricle 3) right atrium 4) right ventricle
the blood
-blood travels through thousands of miles of blood vessels right within your own body -carries nutrients, water, oxygen, blood cells, and waste products to and from your body cells -a young person has about a gallon of blood, an adult has about 5-6 quarts -blood that is carrying oxygen-rich/oxygenated blood flows through arteries -blood carrying carbon dioxide (oxygen-poor/deoxygenated blood) flows through veins
blood flow
1) blood leaves the lungs and goes into the left atrium 2) blood passes from the left atrium into the left ventricle 3) blood is pumped into a larger artery and goes throughout the body 4) blood passes from the large artery into smaller and smaller arteries 5) blood passes from the smallest arteries into the capillaries and then into the cells 6) blood passes from the body cells back into the capillaries 7) from the capillaries the blood enters the smallest veins 8) blood passes from the smallest veins to larger veins and returns to the right atrium 9) blood passes from the right atrium to the right ventricle 10) blood is pumped to the lungs after leaving the right ventricle 11) cycle begins again
pathway of blood
1)at the alveoli, blood gets its refill of oxygen and the blood takes it to the heart 2)heart pumps the oxygen-rich blood to the body through arteries where your body cells and organs need the oxygen to continue to work 3)as your body performs any sort of work, the oxygen gets used up, leaving behind waste, in the form of carbon dioxide 4)the oxygen-poor blood sends the CO2 through the veins and returns it to the heart 5) the heart pumps the blood to the lungs, where it enters the alveoli and is then breathed out of the body
oxygen poor blood
blood not carrying oxygen but is carrying CO2 instead
oxygen rich blood
blood that is carrying lots of oxygen
white blood cells (the germinators)
help the body fight off germs by attacking and destroying germs when they enter the body
platelets (the medics)
blood cells that help stop bleeding, stick together at the site of the wound and form a plug, when the plug is completely formed, the wound stops bleeding and we have a scab
where blood cells are made
red blood cells, white blood cells, and platelets are made by red bone marrow; a soft tissue inside of our bones, when we lose blood we will retain the same amount of blood as new blood cells are reproduced
right ventricle
sends the oxygen-poor blood to the lungs to be refilled with oxygen
plasma (the river)
the liquid part of blood, makes up more than half of your blood, carries the blood cells throughout the body
parts of the circulatory system
three major parts: the heart the blood the blood vessels
the blood vessels
three types: arteries, veins, capillaries
capillaries
tiny blood vessels that are as thin/thinner than the hairs on your head, connecting arteries to veins
circulatory system responsibilities
transports oxygen, blood cells, and nutrients to body cells and carries away wastes such as carbon dioxide to be released
