Human body cells are organized
as tissues, organs and systems
11.1 Cell Organization
Cell Organization
A system is made up of parts that work
together as a whole.
Each system of the body consists of
organs that are made up of different
kinds of tissue.
Tissue are themselves made up of many
similar cells working together to carry
out a specific function.
Analogy:
A bike is made of many different parts
such as the wheels, chain, cables and
break pads.
Each part of the bike plays a specific role
and it is all of these parts that allow
the bike to work properly.
Characteristics of a System
1. A system is made up of individual
parts that work together as a whole.
2. A system is often connected to one or
more other systems.
3. If one part of a system is missing or
damaged, the system will not function
well or may not function at all.
Imagine this: if the break pad on your
bike were not working what would
happen???
Tissues
Tissues are groups of similar cells. All
muticellular (made of many, many
cells) organism have tissues.
These tissues are classified according to
the function they perform.
See page. 422 and discuss the different
types of tissue there. What function
does each tissue provide, is this why
it is different from the other tissues?
Organs are groups of tissues
Organs are distinct structures
that perform specific
functions
Each organ in the body is made
up of two or more types of
tissues that work together.
Tissues of the Stomach
Look at page 423 in your textbook.
How many types of tissue do you see
there?
Organ Systems are Groups of
Organs
Organs are organized into organ systems
to perform activities that help the body
as a whole.
Can you name the organs involved in the
Circulatory System, the system
involved in moving blood – Hint there
are 5
Questions: Page 423 1-4
Activity: Read page 424
Pig Parts for People?
Class discussion
Check your understanding questions:
Page 425 1-4, 5 and Pause and Reflect
Introducing Human Body Systems
There are 11 body systems
Circulatory
Digestive
Endocrine
Excretory
Immune
Integumentary
Muscular
Nervous
Reproductive
Respiratory
Skeletal
Activity:
Human Body Systems Foldable
Check your understanding:
Page 431 1-4, 5-6