Bell Work: 12/4/13

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Bell Work 12/4/13
You are being timed! You only get 10 minutes to
complete bell work!

• Using the Human Body Quest Bell Work packet,
  complete the questions for cardiovascular and
  respiratory systems.
• Use the page numbers provided.

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Objectives

• Explain the basic functions of a major organ
  system. (SPI0707.1.3)
• 53. Cardiovascular and Respiratory Systems (one
  page)

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Cardiovascular/Circulatory (pg. 232-237)

• 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.

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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 oxygen-rich blood are shown in
red. The vessels carrying oxygen-poor blood are
shown in blue.
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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
• Arteries- carries blood away from the heart
• Capillaries- allows exchanges between body cells
  and blood
• Veins- carries blood back to the heart

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Respiratory System (pg. 246-249)

• 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

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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
• Inhale and the diaphragm contracts, moves down,
  and the chest cavitys volume increases.
• At the same time, rib muscles contract and lift
  the rib cage.
• The chest cavity gets bigger and a vacuum is
  created.
• Air is sucked in.

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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.

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Human Body Books
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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 bodys needs.

• 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.