There are few different structural characteristics of animals. Some of these are vertebrae versus non-vertebrae, mammal versus cold-blooded, feathered, scaled, furry, carnivore, omnivore, or herbivore.
Cell membranes are found surrounding both plant and animal cells
The specific structure within an animal cell that is not labeled in typical diagrams is the glycocalyx.
It is the part that controls both animal and plant cells
The plant cell has a cell wall and chloroplasts (photosynthetic organelle) which the animal cell does not.
An animal cell is composed of various structures including the nucleus, cytoplasm, cell membrane, endoplasmic reticulum, Golgi apparatus, mitochondria, lysosomes, and cytoskeleton. These structures work together to maintain cellular functions, such as cell growth, metabolism, and division.
that the animal once had a use for that structure depending on where it lived. or that it decended from an animal that had that structure and used it.
Animal cells have lysosomes and plants cells do not.
An insect is a type of animal. Any structure on an insect is, by definition, a structure on an animal.
Animal cell structure differs from that of humans because humans have several billion cells and animals sometimes only have one. However, the basic structure of each cell is similar.
The nucleus
Centrioles are not a common in most of the plants
little one
Gland
Cell membranes are found surrounding both plant and animal cells
If by structure you mean organelles, then ribosomes.
Gland
no