Transcript CIRCULATORY AND RESPIRATORY SYSTEMS

BODY SYSTEMS
TUESDAY, NOVEMBER 28, 2012
CARDIOVASCULAR SYSTEM
• Heart
– Muscle
– Located in the middle of your chest, behind and
slightly to the left of your breastbone.
Sends blood around body
Right side – receives blood from body and pumps it to the lungs
Left side – receives blood from lungs and pumps it to the body
– Made up of four blood-filled areas called chambers
• Top: atria (left atrium and right atrium) – fills with blood returning to the
heart from body and lungs
• Bottom: left and right ventricles – squirts blood to the body and lungs
• Blood
– Provides body with oxygen and nutrients it needs; carries away
wastes
• Blood vessels
BLOOD VESSELS
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Arteries and veins together
Attached to the heart
Arteries carry blood away from the heart
Veins carry blood back to the heart
Movement of blood through the heart and
around the body is circulation. Takes less
than 60 seconds to pump blood to every cell
in your body (blood delivers oxygen to all
body cells)
HEART FACTS
• Beats 60-100 times/minute
• Can beat much faster when needed
• Beats about 100,000 times/day; more than 30
million times/year
• While sleeping, pumps just enough to provide
for lower amounts of oxygen needed at rest
• While exercising or frightened, it pumps faster
to get more oxygen to our bodies
• Weighs between 7-15 ozs.
HEART PROBLEMS
• Congenital – present at birth
• Acquired – problems developed
after birth
RESPIRATORY SYSTEM
• Respiration- term used for the exchange of
oxygen from the environment for carbon
dioxide from the body’s cells.
• The process of taking air into the lungs –
INHALATION
• The process of breathing air out EXHALATION
RESPIRATORY SYSTEM
• Nose, throat, voice box (larynx), trachea
(windpipe), and lungs.
• Muscles that help you breath
(diaphragm, abdominal and neck
muscles)
RESPIRATORY SYSTEM
• Carbon dioxide – waste gas produced
when carbon is combined with oxygen
• Allows oxygen in the air to be taken into
the body; also allows the body to get rid
of carbon dioxide when breathing out
RESPIRATORY SYSTEM
• CILIA – tiny hairs that protect the nasal
passageways and parts of the respiratory
tract.
• Respiratory system filters out foreign matter
and organisms that enter through the nose
and mouth.