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7-3 Human Body Guided Notes
Levels of Organization:
Cells → Tissues → Organs → Organ Systems → Organisms
Cells:
• The _________ ________ ___ __________ and function within the human body.
• Though all cells ____________ ______ ____________ that keep humans alive, they also
have specialized functions as well.
• Examples may be nerve cells (neurons), blood cells, and bone cells.
Tissues:
• A ________ ____ __________ _______that work together to perform the same function.
• There are four basic types of tissue in the human body:
• __________ __________ —carries impulses back and forth to the brain from the
body
• ____________ ___________ (cardiac, smooth, skeletal)—contracts and shortens,
making body parts move
• ____________ ____________ —covers the surfaces of the body, inside (as lining
and/or covering of internal organs) and outside (as layer of skin)
• ______________ __________ —connects all parts of the body and provides
support (for example tendons, ligaments, cartilage)
Organs:
• A group of _______ ____ _______different types of _________that work together to
perform a specific function.
• The task is generally more ___________than that of the tissue.
• For example, the heart is made of muscle and connective tissues which function to pump
blood throughout the body.
Organ Systems:
• A group of _____ ___ ______ ________that work together to perform a specific
function.
• Each __________ ___________has its own function but the systems __________
____________and depend on one another.
• There are eleven different organ systems in the human body: circulatory, digestive,
endocrine, excretory (urinary), immune, integumentary (skin), muscular, nervous,
reproductive, respiratory, and skeletal
Human Body Systems:
Digestive System:
The main functions of the digestive system are to ______________ ________into
nutrients that can be used by the body, absorb nutrients that are necessary for __________,
_____________, and___________________, and rid the body of solid wastes.
Respiratory System:
• The main function of the respiratory system is to __________ _____ _________between
the blood and the air.
• When air is inhaled, the lungs remove some of the ____________.
• ___________ ____________is exhaled back into the environment.
Circulatory System:
• The main function of the circulatory system is to ___________ __________to all parts of
the body so that gases, nutrients, and waste products are transported to and from the cells.
• The ________ ________ ________within the circulatory system help to fight
____________in the body
Excretory Systems:
• The main function of the excretory system is to _______ _______ ________ ________,
toxins (chemicals that could be poisonous to the body), and excess water that result from
cellular respiration.
Nervous System:
• The main functions of the nervous system are to ________ ___________from inside and
outside the body, to_____________ _____ __________, and initiate ____________for
survival.
Muscular System:
• The main function of the muscular system is to provide _______________.
Skeletal System:
• The main functions of the skeletal system are to ___________ ___________for the body,
to ____________ internal organs, and to provide ____________ ________for the
muscles.
Working Together:
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All body systems are dependent upon the circulatory system to _____________materials.
The circulatory system works with the excretory system to help _________ _________
from the body.
The respiratory system works with the circulatory system to make sure that ________
reaches the bloodstream and ___________ __________is removed from the bloodstream.
The digestive system works with the circulatory system to make sure that nutrients made
available by ______________(for example glucose) get to the cells of the body.
The nervous system works with the muscular and skeletal systems to __________
______________ and movement.
The nervous system controls internal ________________in the body (for example
digestion and circulation).
Muscles control the _____________ of materials through some organs (for example the
stomach, intestines, and the heart).
The muscular and skeletal systems work together to help the __________ ___________.