All animal cells are multicellular. They are eukaryotic cells surrounded by plasma membrane and contain the nucleus and organelles that are membrane bound.

 

Animal cells are of various sizes and have irregular shapes. Most of the cells size range between 1 and 100 micrometers and are visible only with help of microscope. Trillions of cells are found in the human body. There are many different types of cells, approximately 210 distinct cell types in adult human body.

 

The cell organelles have a vast range of functions to perform like hormone and enzyme production to providing energy for the cells. Some of the components of animal cells are endoplasmic reticulum, golgi apparatus, lysosomes, cytoplasm, mitochondria, nucleus, Cell membrane and ribosomes.