BIO 3.1 The Hierarchy of Structure in Animals

Question 1

Hierarchy of Organization

Answer 1

Cells –> Tissue –> Organs –> Organ System –> Organism

TISSUE
A collection of similar cells that perform a particular, yet limited function.

ORGAN
A structure composed of different tissues working together to perform a complex bodily function.

ORGAN SYSTEM
One or more organs work together to perform a bodily function.

Question 2

What are the 4 tissue types ?

Answer 2

–Muscle
–Nerve
–Epithelial
–Connective

Question 3

Muscle Tissue

Answer 3

DESCRIPTION
–bundles of long cells
–contain specialized proteins
–capable of contracting

FUNCTION
–movement

Question 4

Nerve Tissue

Answer 4

DESCRIPTION
–long, thin cells with fine branches at the end
–capable of conducting electrical impulses

FUNCTION
–sensory, able to detect changes in the environment
–communication within the body
–coordination of body function

Question 5

Epithelial Tissue

Answer 5

DESCRIPTION
–thin sheets of tightly packed cells that cover surfaces and lining internal organs

FUNCTION
–protection from dehydration
–low friction surface

Question 6

Connective Tissue

Answer 6

DESCRIPTION
–various types of cells and fibers held together by a liquid/solid/gel known as matrix

FUNCTION
–support and insulation