Unit 3: Biology Date:_________________________

1.3b Levels of Organization

LEVEL 1CELLS

basic unit of _____

serve a _________ __________ within the organism

Ex:

LEVEL 2TISSUES

Made up of cells that are similar in ___________ and ___________

_________ work _____________ to perform a specific _____________

TYPES:

Type Example Description Function

Epithelial SkinLining of digestive system

Thin sheets of tightly packed cells covering surfaces and lining internal organsContain no blood vessels, receive nutrients via diffusion from other tissues

Protection from dehydrationSecrete, absorb

Connective Bone, Tendons, Blood Cells and fibers held together like a mesh Support, Insulation

Muscle Skeletal (voluntary)Smooth (involuntary)

Cardiac

Anchored by tendons to bonesWalls of the esophagus stomach, intestines, bronchi, uterus, urethra, bladder, blood vesselsFound only in the heart

Motion, maintain posture

Nervous BrainNerves in sensory organs

Long thin cells with branchesConduct electrical impulses

SensoryCommunication within the bodyCoordination of body functions

Unit 3: Biology Date:_________________________

LEVEL 3ORGANS

______ that ____ _______ to perform a specific activity

Most organs work within a ________ ______ ________

-___________ is part of the __________ ______________

_________ organs work within _______ _____ _______ system

-___________ is part of the ______________ and

___________ ________________

LEVEL 4SYSTEMS

Groups of ______ ___ _____ organs that ______ ___________ to perform a specific function for the organism

LEVEL 5ORGANISM

_______ ________ _______ that carries out all _______ _______ ______________.

Take in materials, release energy from food, release wastes, grow, respond to the environment, and reproduce

Unit 3: Biology Date:_________________________

System Organs

DIGESTIVE

CIRCULATORY

RESPIRATORY

NERVOUS

URINARY

REPRODUCTIVE

INTEGUMENTARY

LYMPHATIC

MUSCULAR

SKELETAL

ENDOCRINE