IB2.5.3 Animal tissues © Oxford University Press 2011 Animal tissues.

IB2.5.3 Animal tissues

© Oxford University Press 2011

Animal tissues

IB2.5.3 Animal tissues

© Oxford University Press 2011

Glandular stomach tissue

Layer of cells

Cells are very active making and releasing products

Some cells make chemicals like acids

Some cells make thick mucus to coat the cells

Some of the cells make enzymes for digestion

Lines the inside of organs

IB2.5.3 Animal tissues

© Oxford University Press 2011

Epithelial tissue

Often smooth, to allow the organ to move easily around other organs

Layers of cells

Arranged very evenly

Forms a protective coat around an organ

IB2.5.3 Animal tissues

© Oxford University Press 2011

Muscle tissue

Cells are long and thin

Cells filled with lots of contracting proteins

Cells able to contract and relax which allows them to change shape and, in turn, to change the shape of the tissue

Changing the shape of the tissue causes movement of the tissue or of the fluids around it