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Human Bodies: pathways
grade 5 science unit 7
26
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03/04/2004

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Term
plasma
Definition
the pale-yellow liquid part of blood made mostly of water that contains nutrients
Term
hemoglobin
Definition
a chemical that carries oxygen around in the body
Term
platelet
Definition
help blood clot when you cut yourself
Term
white blood cells
Definition
help fight infections
Term
red blood cells
Definition
carry oxygen and carbon dioxide throughout the body
Term
artery
Definition
a blood vessel that carries blood away from the heart
Term
vein
Definition
a blood vessel that carries blood to the heart
Term
capillary
Definition
the smallest type of blood vessel, where materials are exhanged between blood and body cells
Term
transfusion
Definition
taking blood from one person and giving it to another person
Term
antibody
Definition
a protein in the blood the helps the body find and destroy materials that may be harmful
Term
respiration
Definition
a process getting and using oxgyen in the body
Term
diaphram
Definition
a sheet of muscles below the chest that helps control breathing
Term
trachea
(tray-key-ah)
Definition
your windpipe: it moves the air between your throat and lungs
Term
mucus
Definition
the sticky stuff in your nose and throat that traps particles that you inhale such as dirt or germs
Term
cilia
(silly-ah)
Definition
the small hairs in your nose that keep little people of dust from getting into your lungs
Term
diffusion
(di-few-shion)
Definition
what the alveioli do: taking in oxygen and letting out the carbon dioxide
Term
respiration
Definition
getting oxygen into the body and using it
Term
carbon dioxide
(die-ox-eye-d)
Definition
the gas that you breathe out
Term
oxygen
Definition
the gas that you breathe in
Term
pulmonary artery
Definition
the artery that takes the blood from the lungs to the artery
Term
left ventricle
Definition
blood goes into the left chamber of the heart before it is pumped into the body
Term
aorta
Definition
the big artery that carries blood from the heart to the body
Term
pulmonary vein
Definition
caries the red blood with oxygen from the lungs back to the heart
Term
name the four chambers of the heart
Definition
-left atrium
-right atrium
-left ventricle
-right ventricle
Term
name three things the book listed as ways you can strengthen your circulatory system
Definition
- exercise
- eat right
- regular medical check ups
Term
What is the main purpose of the lymphatic system?
(lim-fatic)
Definition
fighting germs by filtering them out in the lymph nodes
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