Chapter 1Chapter 1

Systems, Support, and MovementSystems, Support, and Movement

Section 1.1 – The human Section 1.1 – The human body is complex.body is complex.

The body has The body has cellscells,, tissuestissues and and organsorgans.. List the organization of your body from List the organization of your body from

smallest to largest:smallest to largest:

cellscells tissuestissues organsorgans organ systemsorgan systems organismorganism

Although these levels may seem separate Although these levels may seem separate from one another, they all work from one another, they all work TOGETHERTOGETHER..

CellsCells

The basic unit of The basic unit of lifelife.. Make up all Make up all living thingsliving things.. There are 2 kids of cells:There are 2 kids of cells:

AnimalAnimal PlantPlant

TissuesTissues

A group of similar A group of similar cellscells that work that work together to perform a particular together to perform a particular functionfunction..

To carry out their functions, To carry out their functions, cellscells must must be be organizedorganized as a as a tissuetissue..

Types of TissuesTypes of Tissues

EpithelialEpithelial Functions as a boundary.Functions as a boundary. Covers all the inner and outer Covers all the inner and outer surfacessurfaces of of

your body.your body.

NerveNerve Functions as a messaging system.Functions as a messaging system. Carries Carries electricalelectrical impulses between your impulses between your

brain and the rest of your body.brain and the rest of your body.

Types of Tissues (cont.)Types of Tissues (cont.)

MuscleMuscle Functions in movement.Functions in movement. Can be Can be voluntaryvoluntary or or involuntaryinvoluntary..

ConnectiveConnective Holds parts of your body together.Holds parts of your body together. Provides Provides supportsupport, , protectionprotection, , strengthstrength, ,

paddingpadding, and , and insulationinsulation..

OrgansOrgans

Structure that is made up of 2 or more Structure that is made up of 2 or more types of types of tissuetissue that work together to that work together to carry out a function in the body.carry out a function in the body.

The The structurestructure of an organ relates to its of an organ relates to its function.function.

What are some examples of organs?What are some examples of organs?

Organ SystemsOrgan Systems

A group of organs that together perform a A group of organs that together perform a function that helps the body meet its function that helps the body meet its needs for needs for energyenergy and and materialsmaterials..

Organ systems allow the human Organ systems allow the human organism to organism to growgrow, , reproducereproduce, and , and maintain maintain lifelife..

Examples of Organ SystemsExamples of Organ Systems

SkeletalSkeletal MuscularMuscular RespiratoryRespiratory DigestiveDigestive UrinaryUrinary CirculatoryCirculatory ImmuneImmune NervousNervous ReproductiveReproductive

HomeostasisHomeostasis

The body’s systems interact with one The body’s systems interact with one another.another.

HomeostasisHomeostasis is the ability of your body is the ability of your body to maintain internal conditions.to maintain internal conditions.

What is an example of this?What is an example of this?

Review:Review:

Draw a diagram that shows the Draw a diagram that shows the relationship among cells, tissues, organs, relationship among cells, tissues, organs, and organ systems.and organ systems.

Identify three functions performed by Identify three functions performed by organ systems.organ systems.

Make a chart of the four basic tissue Make a chart of the four basic tissue groups that includes names, functions, groups that includes names, functions, and examples.and examples.