AARPâs Age-Friendly Communities Networ As the U.S. population continues to age and as people stay healthy and active longer, American cities, towns, and counties must adapt to the needs of changing demographics to serve the interests of their residents and sustain economic and social vitality.
Cell wall: The cell wall is a rigid layer that surrounds the plant cells. Plant cell walls are primarily made up of cellulose. It is located outside the cell membrane whose main function is to provide rigidity, strength, protection against mechanical stress and infection.
The extracellular matrix of animal cells holds cells together to form a tissue and allow tissues to communicate with each other. Explain the role of the extracellular matrix in animal cells. The extracellular matrix of animal cells is made up of proteins and carbohydrates.