Transcript Respiratory System

Bell Work: 12/5/13
• Using the Human
Body Quest Bell
Work packet,
complete the
questions for
cardiovascular and
respiratory systems.
• Use the page
numbers provided.
You are being timed! You only
get 10 minutes to complete
bell work!
Objectives
• Explain the basic functions of a major
organ system. (SPI0707.1.3)
39. Cardiovascular and Respiratory Systems
(one page)
Cardiovascular/Circulatory
(pg. 232-237)
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•
•
Your heart, blood, and blood vessels make up
your cardiovascular system.
Your heart creates pressure when it beats,
moving blood throughout the body.
The cardiovascular system helps maintain
homeostasis (stable internal environment) by:
–
–
Carrying blood and nutrients to your cells and
removing wastes from your cells.
Carrying chemical signals called hormones
throughout the body.
Cardiovascular/Circulatory
(pg. 232-237)
• The heart is an organ
made mostly of
cardiac muscle tissue.
• The heart is about the
size of your fist and is
almost in the center of
your chest cavity.
The heart pumps blood through blood
vessels. The vessels carrying oxygenrich blood are shown in red. The
vessels carrying oxygen-poor blood
are shown in blue.
Cardiovascular/Circulatory (pg. 232-237)
•
•
•
Blood is a connective tissue made up of plasma, red blood
cells, platelets, and white blood cells.
Blood travels throughout your body carrying oxygen and
nutrients in hollow tubes called blood vessels.
Three types of blood vessels:
1. Arteries- carries blood away from the heart
2. Capillaries- allows exchanges between body cells and
blood
3. Veins- carries blood back to the heart
Respiratory System (pg. 246-249)
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•
•
Respiration is the process by which a
body gets and uses oxygen and releases
carbon dioxide and water.
The respiratory system is a group of
organs that take in oxygen and get rid of
carbon dioxide.
Respiratory System Organs:
– Nose, throat, lungs, and passageways that
lead to the lungs
Respiratory System (pg. 246-249)
•
•
Breathing is done by the diaphragm
(muscle) and rib muscles since the lungs
have no muscles of their own.
Breathing Steps:
1. Inhale and the diaphragm contracts, moves
down, and the chest cavity’s volume
increases.
2. At the same time, rib muscles contract and
lift the rib cage.
3. The chest cavity gets bigger and a vacuum
is created.
4. Air is sucked in.
Interesting Facts
Cardiovascular System:
• The heart beats around 3 billion times in
the average person's life.
• Heart diseases are the leading cause of
death in the U.S.
• A heart attack happens when heart
muscle cells die and part of the heart
muscle is damaged. Arteries that deliver
oxygen to the heart may be blocked and
without oxygen, heart muscle cells die
quickly. When enough muscle cells die,
the heart may stop.
• Heart failure happens when the heart
cannot pump enough blood to meet the
body’s needs.
• In humans and other hemoglobin-using
creatures, oxygenated blood is bright red.
This is due to oxygenated iron in the red
blood cells. Deoxygenated blood is a
darker shade of red, which can be seen
during blood donation and when venous
blood samples are taken. However, due
to an optical effect caused by the way in
which light penetrates through the skin,
veins typically appear blue in color. This
has led to a common misconception that
venous blood is blue before it is exposed
to air.
Respiratory System:
• The right lung is slightly larger
than the left.
• When people who live at low
elevations travel up into
mountains, they may find
themselves breathing heavily.
• Hairs in the nose help to clean
the air we breathe as well as
warming it.
• The highest recorded "sneeze
speed" is 103 miles per hour.
• The surface area of the lungs is
roughly the same size as a
tennis court.
•
Bruises- capillaries are
damaged by trauma allowing
blood to seep into the
surrounding tissues.
Drawings
• For each body system, draw and color at
least one organ that belongs in that body
system.
• For example:
– Cardiovascular System = heart, arteries, and
veins
– Respiratory System = nose, bronchus,
pharynx, larynx, trachea, lungs, diaphragm
• Use your textbook pictures or the sample
sheet in the folder at your group.
Human Body Books