Download Organization of Living Things

Organization of
Living Things
Page 74-75 in your science notes
Cell Specialization
 Different
kinds of cells perform
different functions. The
structure of the cells enables
them to perform their functions.
Red Blood Cells

For example, red
blood cells carry
oxygen
throughout the
body. Their thin,
flexible structure
helps them
squeeze through
tiny blood vessels.
Nerve Cells
 Nerve
cells
have long,
threadlike
projections
that carry
messages
throughout
the body.
Tissues
Cells in complex organisms interact
with other cells to perform their
functions. A group of cells that
performs a specialized function is
called a tissue.
 Animals have four basic types of
tissue: nerve, muscle, connective,
and epithelial (protective).

Nervous Tissue
Muscle Tissue
Connective Tissue
Epithelial (protective) Tissue
Organs
A
group of tissues that perform
a specific function is an organ.
 Name
body.
some organs in your
Your Heart

Your heart is an organ made up of
cardiac muscle tissue, nerve tissue,
and blood tissue. The cardiac
muscle tissue contracts, making
the heart pump. The nerve tissue
brings messages that tell the heart
how fast to beat. The blood tissue
is carried from the heart to other
organs of the body.
Organ Systems

An organ system is a group of
organs that perform a complex
function. Examples include:
digestive, circulatory, nervous,
skeletal. The skeletal system
functions to support the body and
give it shape.
Organisms

Anything that can live on its own is
called an organism. If the organism
is only a single cell, it is called a
unicellular organism. Bacteria are
unicellular. Multicellular organisms
are composed of many different cells,
tissues, organs and organ systems.
Unicellular Organisms
Multicellular organisms
Population

A population is all the members of
one kind of organism in a particular
area.