Multiple sheets of thin paper used to clean your nose

The smallest structural and functional unit of an organism

A series of different cells in the same area

A group of structurally and functionally related cells that come together to perform common functions

Act as barriers between the external environment, or between organs and fluidfilled cavities

Provide movement by pulling on bones

Provide secretions which help to digest food

Act as the messaging pathway between different areas of the body

Square with large central nucleus

Flat, 'fried egg' appearance

Rectangular with nucleus towards basal end

Dead apical cells filled with keratin

Exocrine cells secrete fluids to the outside of the body; endocrine cells secrete fluids into the inside of the body

They are synonymous

Exocrine cells secrete fluids into ducts; endocrine cells secrete fluids into the blood stream

Exocrine cells secrete clear fluids; endocrine cells secrete opaque fluids

Smooth muscle

Skeletal muscle

Cardiac muscle

Deoxygenated muscle

Cardiac muscle

Skeletal muscle

Smooth muscle

Nervous tissue