Plant cells often have a box-like shape. Animal cells come in a wide variety of shapes. Plant cells have a stiff cell wall and a thin cell membrane. Animal cells only have a cell membrane. Many plant cells have green chloroplasts.
Chloroplasts make food.
Animal cells do not have chloroplasts. A tissue is a group of cells that are alike. Heart tissue is made of heart cells. Brain tissue is made of brain cells. Heart tissue is different from brain tissue.