Transcript Science Ch 1D

Science Ch 1D
Study Guide
Lesson 1- How does your body
take in oxygen
• About _____ of the air that you breathe in is a
gas called _____.
– 1/5
– oxygen
• As your cells _____, they make a gas called
_____. This gas leaves your body as a waste
when you _____.
– Work
– Carbon dioxide
– Breathe out
Lesson 1- How does your body
take in oxygen
• The respiratory system includes your _____,
your _____, and the _____ that connect them.
– Nose
– Lungs
– Tubes
• Air enters the body through the _____, which
has the job of getting the air ready for the _____
– Nose
– Lungs
Lesson 1- How does your body
take in oxygen
• The nose’s lining makes a sticky liquid
called _____ which adds _____ to the air.
– Mucus
– Moisture
• Mucus and tiny hairs inside the nose also
_____ _____ from the air.
– Trap dust
Lesson 1- How does your body
take in oxygen
• Another name for the windpipe is the
_____, which divides into 2 _____ _____.
– Trachea
– Bronchial tubes
• When you breathe in, you _____.
– Inhale
• When you breathe out, you _____.
– Exhale
Lesson 1- How does your body
take in oxygen
• Inhaled air, which is rich in _____, enters the air
sacs.
– Oxygen
• An exchange of _____ and _____ takes place in
the _____.
– Oxygen
– Carbon dioxide
– Air sacs
• Now red blood cells have oxygen to deliver to
_____
– Body cells
Lesson 1- How does your body
take in oxygen
• Carbon dioxide leaves your body when
you _____.
– Exhale
• The large muscle below your lungs that
allows you to breathe is the _____.
– Diaphragm
Lesson 2 – How does your body
use oxygen
• When red blood cells are carrying oxygen,
they are _____.
– Bright red
• After red blood cells give up their oxygen,
they become dark, dull and _____.
– purplish
Lesson 2 – How does your body
use oxygen
• Capillaries are tiny _____ with thin walls
through which _____, _____, and _____
pass.
– Blood vessels
– Oxygen
– Nutrients
– Waste
Lesson 2 – How does your body
use oxygen
• Capillaries are so narrow that _____ have to
move through them in _____ _____.
– Red blood cells
– Single file
• Blood flows from the _____into blood vessels
called _____, which carry the blood to your
____.
– Capillaries
– Veins
– Heart
Lesson 2 – How does your body
use oxygen
• Almost all living things need _____ to stay alive
as well as _____.
– Oxygen
– Food
• Your digestive system changes food into
nourishing substances called _____.
– Nutrients
• Like red blood cells, nutrients are carried by
_____.
– Plasma
Lesson 2 – How does your body
use oxygen
• Cells use _____ to break the sugar down into
_____ and _____.
– Oxygen
– Carbon dioxide
– Water
• When your cells break down sugar, they release
_____.
– Energy
• All of the _____ that your body needs is made
this way.
– Energy
Lesson 2 – How does your body
use oxygen
• Cells use energy to _____, to _____, and
to _____.
– Grow
– Divide
– Repair damage
Lesson 3 – How does your body
get rid of cell waste
• Your body gets rid of, or _____, cell waste.
– Excretes
• Your _____ does most of this work with
some help from your _____ and _____.
– Excretory system
– Lungs
– Skin
Lesson 3 – How does your body
get rid of cell waste
• Your body cells constantly produce _____.
– Cell wastes
• This waste moves through the thin walls of
_____ and enters the _____ and is carried
by the _____.
– Capillaries
– Blood
– Plasma
Lesson 3 – How does your body
get rid of cell waste
• Carbon dioxide is _____ from the _____.
– Exhaled
– Lungs
• Nitrogen wastes are removed by the
_____, the main organ of the _____.
– Kidneys
– Excretory system
Lesson 3 – How does your body
get rid of cell waste
• Each kidney has about _____ tiny _____ that
filter _____ from the _____.
–
–
–
–
One million
Tubes
Waste
Blood
• Your kidneys clean all of your _____ about
_____ times every day.
– Blood
– 40
Lesson 3 – How does your body
get rid of cell waste
• These wastes form a liquid called _____.
– Urine
• It is temporarily stored in a baglike organ
called the _____.
– Urinary bladder
Lesson 3 – How does your body
get rid of cell waste
• The cleaned blood moves through _____
in the kidneys into _____ that carry it back
to the _____ which pumps the cleaned
_____ throughout the _____.
– Capillaries
– Veins
– Heart
– Blood
– Body
Lesson 3 – How does your body
get rid of cell waste
• Even though your body needs water, it _____
some every day to prevent extra water from
_____.
– Excretes
– Building up
• You excrete water when you _____, in your
_____, and by _____.
– Exhale
– Urine
– Sweating
Lesson 3 – How does your body
get rid of cell waste
• Water excretion helps your body keep a
normal _____.
– temperature