Cells are the smallest unit of life. Cells in multicellular plants and animals are arranged into tissues, organs and organ systems. Cells. Tissues. Organs. Organ systems. And the organism itself.

This observation is explained by another key feature of stem cells that is shared between plants and animals, as explained below. The ability of stem cells to constantly generate new tissues has ...

The debate between animal protein vs plant protein is an age-old argument ... serving as the building block for tissues, muscles, organs, enzymes, hormones, and immunity. It aids in repairing ...