Human Systems Human Systems Part OnePart One

Humans are complex organisms made up of many different types of systems, each carries out a specific life process.

Human SystemsHuman Systems

A- A- LevelsLevels ofof OrganizationOrganization::

1- CellsCells the basic unit of life. Humans have many different cells that carry out many different functions.

2- TissuesTissues:: Groups of similar cells working together to perform a task

Skin Lung Heart

3- 3- OrganOrgan:: Groups of tissues working together to perform a task.

4- 4- OrganOrgan SystemsSystems:: a group of OrgansOrgans working together to perform a task.

II- II- SkeletalSkeletal SystemSystem

A-A- Function

1-Support

2- Protects Internal Organs

3- Produces Blood Cells

B-B- Bones are Strong but Light.

1- 1- JointsJoints: Place where : Place where bones meet.bones meet.

a- ball and socketa- ball and socket

b-hingeb-hinge

c-immovablec-immovable

d-pivot d-pivot

2-2- TendonsTendons: Attach muscle to bone

3-3-LigamentsLigaments: Attach bone to bone

III- III- MuscleMuscle

A- Two Types A- Two Types

1-1- VoluntaryVoluntary you can control

a- Skeletal muscle

2- 2- InvoluntaryInvoluntary you have no control over.

a-a- Cardiac (Heart)

b- b- Smooth (Stomach, Circulatory)

B- B- SkeletalSkeletal MuscleMuscle: Works in opposing pairs

Front View (Anterior) Back View (Posterior)

IV- IV- SkinSkin: :

A- First Line of Defense:A- First Line of Defense:

1- Function=1- Function=

a- Gets rid of wastes (perspire)

b- Regulates Body Temperature

c- Protects if not cut or open

d- Water proof

A.A. POREPOREB.B. HAIRHAIRC.C. NERVE NERVE

ENDINGSENDINGSD.D. FAT CELLSFAT CELLSE.E. SWEAT SWEAT

GLANDGLANDF.F. HAIR HAIR

FOLLICLEFOLLICLEG.G.DERMISDERMISH.H. EPIDERMIS EPIDERMIS I.I. BLOOD BLOOD

VESSELSVESSELS