Esotropia (from Greek eso meaning inward and trope meaning a turning), is a form of strabismus, or squint, in which one or both eyes turns inward. The condition can be constantly present, or occur intermittently, and can give the affected individual a cross-eyed appearance.
In the process of intracellular digestion, lysosomes are the main  organelles. Lysosomes contain enzymes that are made by cells, and  their primary function is to digest thiâ¦ngs. Making the world better, one answer at a time.
Some eukaryotic organisms evolved into multicellular animals, which utilized oxygen but lacked specific respiratory structures. All animals perform gas exchange through their superficial cells (e.g. the skin), which is the only site of gas exchange with the environment in the most primitive animals. Many primitive animals are very flat to increase the surface area for cutaneous gas exchange.