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Human Body Organization


June Sanders

on 27 January 2010

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Transcript of Human Body Organization

Explain that tissues, organs, and organ systems serve the needs cells have for oxygen, food, and waste removal.

What is the smallest
unit of the human body?.
Cells need
______, _____, and _______ and the waste poducts they produce removed in order to function properly. A group of cells that work together to do one job form a _____. A group of tissues
that work
together to do
one job form an
_____. A group of organs
that work
together to do
one job form a
_____. How does water enter the cell? How does oxygen and carbon
dioxide enter and leave
a cell? How does food in the form of a glucose molecule enter the cell? How do large molecules such as proteins and hormones enter and leave the cell? What important tissue fluid delivers all these materials to the cell? Connective tissue- blood,
lymph, ligaments, tendons, cartilage Protective (Epithelial) tissue-
epidermis of the skin and lining of the mouth, nose, ears, and digestive tract. Muscular tissue - cardiac, smooth, and striated muscle tissues. Nerve tissue - tissues in the brain, spinal column, and throughout the body. Connective tissue fills in space between cells,
connects tissues together, supports, protects, nourishes, and
insulates the body. Epithelial tissue covers the outside of the
body and lines the inner surfaces. Muscle tissue contracts and relaxes to
allow movement, it makes up some organs
such as the heart. Nervous tissue transmits messages
throughout the body and processes
messages in the brain. Oorgans are the major structures
of the body systems. Are specialized and conduct
very specific functions. Always contain at least
two different types of tissues,
usually more. An organ may belong
to more than one system. Heart pumps blood, stomach conducts
chemical and mechanical digestion,
skin protects the body for harm. An example is the skin. The epidermis
is made of epitheliel tissue, the dermis is
a combination of connective and
nerve tissue, while the fatty layer contains
connective, nerve, and muscle tissue. The skin can belong to the
integumentary system, the excretory
system, and the nervous system. Systems are more general than organs,
carry out specific functions, and work with other systems to provide for the needs of the body.
The skeletal system provides shape and support for the body. The digestive system breaks
down food so it can be used by
the body. The circulatory system transports
food, water, oxygen, waste products
and many other materials thoughout
the body. The nervous system transmits
messages and coordinates
vital body functions such
as heartbeat and breathing. Systems, organs, and tissues work together to supply cells in the human body with food, water, oxygen, and remove waste products. What are the
four types of human
tissue? r
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