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Science: The Respiratory and Circulatory Systems

Chapter 4, Lesson 2

pg. A96
.
lungs
The main organs of the respiratory system.
heart
The muscle that pumps blood through your blood vessels to all parts of your body.
capillaries
Tiny blood vessels that allow gases and nutrients to pass from blood to cells.
arteries
Blood vessels that take blood away from the heart.
veins
Large blood vessels that return blood to the heart.
Which blood vessels take blood away from the heart?
Arteries are blood vessels that carry blood away from the heart.
Which blood vessels in the lungs help your body take in and give off gases?
Capillaries in the lungs help your body take in and give off gases.
As muscles do more work they need more ________.
Oxygen
Air enters the body through the ______ and ______.
nose and mouth
The ________ are the main organs of the respiratory system.
lungs
Air travels through the _______ down to the lungs.
trachea
In the lungs, oxygen passes through the _________ into capillaries to the circulatory system.
alveoli
__________ travels from the circulatory system through the lungs and out into the air.
Carbon dioxide
_________ traps germs, dust, and dirt.
mucus
Small ______ sweep mucus up and out of your trachea.
hairs
When you exercise, your body needs more _____, so you breathe faster.
oxygen
When blood passes through ________, it exchanges oxygen and carbon dioxide.
capillaries
From your heart, blood first flows away through _______ to the body, then through _______, and back to the heart through _______.
arteries, capillaries, veins
Your ______ is the organ that pumps blood.
heart
Why is it easy for gases to pass between air sacs and blood?
Gases pass easily from air sacs to blood through the thin walls of air sacs and capillaries.
What gases does the body breathe in and breathe out?
The body breathes in oxygen and breathes out carbon dioxide.
________ goes up and _______ goes down in the respiratory system.
Carbon dioxide and oyxygen
Where in the lungs are capilarries found?
Capillaries are found around the air sacs in the lungs.
What is the aorta?
The aorta is the largest artery in the body that goes from the heart.
What is the circulatory system?
The circulatory system includes the heart, blood vessels and the tubes which your blood flows through.
What do red blood cells do?
Red blood cells carry oxygen and carbon dioxide from and to your lungs.
Where are red blood cells produced?
Red blood cells are produced in bone marrow.
What do white blood cells do?
White blood cells destroy bacteria that invades your body.
What do platelets do?
Platelets aid in blood clotting, Stops bleeding.
Platelets are formed from ________ in bone marrow.
bone cells
What is plasma?
Plasma is the liquid part of blood. (90% water)
What part of blood is 90% water?
Plasma is 90% water.
What are the smallest blood vessels?
Capillaries are the smallest blood vessels.
What do the chambers in the heart do?
The chambers in the heart keep blood that enters the heart from mixing with blood leaving the heart.
How many chambers doe the heart have?
The heart has four chambers.
How are chambers in the heart connected?
Chambers of the heart are connected by openings that are covered by valves.
In the heart, what keeps blood flowing in one direction?
Valves in the heart keep blood flowing in one direction.
How large is your heart?
Your heart is as big as your fist.
When does your heart rest?
The heart rest only between beats.
Oxygen passes from ______ to ______.
Oxygen passes from blood to cells.
From the lungs, through the heart, oxygen rich blood travels out of the heart through the ________ to ________ then through capillaries to ________.
From the lungs, through the heart, oxygen rich blood travels out of the heart through the aorta to arteries then through capillaries to cells.