Animals need food to provide energy to existing cells and to provide the raw materials and energy for the construction of new cells. Cells in animal bodies combine oxygen with food to release energy. Even if an animal ha... More »

Animals eat their food through sipping it up through a proboscis; taking it in bite-sized bits, then chewing and swallowing; tearing great chunks from the food and swallowing; tearing smaller bits from the food and swall... More »

Most animals obtain food from hunting or foraging. Rarely, some, like the ant, also produce food through farming. Some species of ants raise aphids to eat the honeydew the smaller insects produce. More »

Meristematic cells are plant cells that divide and create new cells. They are physically responsible for the growth of the plant. There are two main types of meristematic cells: primary or apical meristems, which are res... More »

Reproductive cells in animals, called gametes, are examples of haploid cells. Both male and female reproductive cells, known respectively as sperm and egg cells, are haploid in that they each possess one copy of each typ... More »

Animal cells don't have chloroplasts because animals aren't green plants. Chloroplasts are organelles, or small, specialized bodies in plant cells that contain chlorophyll and help with the process of photosynthesis. Lik... More »

A centriole is a small cylindrical organelle in animal cells that employs materials to form centrosomes and cilia, the projections of the cells that are responsible for the body’s movement and sensory functions. During c... More »