Download System Interactions chapter 15

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System Interactions chapter 15.6
How do you move? P565-566
Muscles, Nervous system, and skeletal system all work together to help you
move.
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 Skeletal Muscle is muscle that is attached to your skeleton. As you contract
or relax your muscles your skeleton moves.
 Bones and joints help your body bend to move. Your skeleton is rigid and
cannot bend easily. A joint is in between the space where two bones meet.
How do materials travel around your body? P.567-569
The circulatory, respiratory, digestive, and excretory system move materials
around your body.
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 Transporting materials to and from cells is completed by your circulatory
system. Blood travels through your veins. Your blood carries necessary materials
like food, water, and oxygen to your cells. When your cells create waste (like
carbon dioxide and other types of waste) your veins carry those things away from
the cell.
 Breathing in and out is controlled by your nervous system. Your respiratory
system is responsible for the process of breathing. Muscles in your chest expand
and collapse to help your lung take in and push out air. Your heart pumps low
oxygen high carbon dioxide blood to your lungs. You exhale the CO2 and inhale
O2. The blood in your lungs pick up the oxygen and travel back into the heart.
The heart pumps the high oxygen blood all over your body.
 Getting food to your cells is completed by the digestive system. You eat and
break down food first in your mouth. Your stomach breaks down food further.
Your small intestines carry small bits of nutrients to your blood stream so that
your blood can take those nutrients to your cells (called absorption). Sugar is
converted into energy by your cells.
 Moving waste is completed by your Excretory system. Your kidneys receives
waste from your blood and filter it and becomes urine. The solid waste comes
from the food you eat. What ever is not used in the body from your food leaves
through your large intestines/colon.
Which system controls body functions? P.570-571
Your nervous system controls the body’s functions. Your brain, nerves, and
spinal cord are all involved. There are other messages that are sent around your body by
chemical signals from the endocrine system.
 Nervous System includes your eyes, ears, skin, nose and taste buds. Your
senses help you react to your environment. A signal that causes an reaction is
called a stimulus. For example a hot object is a stimulus. What your body does
in response to the stimulus is called a response. For example moving your hand
away from a hot object is a response. Some of these reactions are controlled by
you and some are not. When you salivate from seeing food is a involuntary
reaction caused by your nervous system.
 Endocrine system is the system that deals with hormones. This system has
glands that release chemical signals into your blood. For example when you
sweat when working out your using your endocrine system. Hormones are also
released from the endocrine system. Hormones control the amount of water in
your body, how much sugar is in your blood, and affects the
Reproductive system.