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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