Plant and animal cells differ in several key ways. Plant cells are typically rectangular in shape and larger than animal cells, which are usually spherical and smaller. Plant cells have a thick cell wall made of cellulose and hemicellulose, while animal cells only have a thin cell membrane. A prominent vacuole is present in plant cells but small and temporary in animal cells. Plastids are found only in plant cells, while centrosomes are present in animal cells to aid cell division. Mitochondria are more numerous in animal cells compared to plant cells. Plant cells can synthesize all amino acids whereas animal cells can only synthesize some kinds. Cell division occurs via cell plate in plants but by furrow in animals.