<p>Cells are the basic building blocks of all living things and come in two main types: eukaryotic and prokaryotic.</p> <p>Eukaryotic cells are more complex than prokaryotic cells and have specialized structures called organelles, such as mitochondria, chloroplasts, and ribosomes.</p> <p>The cell membrane encloses the cell, controls what enters and exits, and is composed of a double layer of phospholipids with embedded proteins.</p>

<p>Cells are the basic building blocks of all living things and come in two main types: eukaryotic and prokaryotic.</p> <p>Eukaryotic cells are more complex than prokaryotic cells and have specialized structures called organelles, such as mitochondria, chloroplasts, and ribosomes.</p> <p>The cell membrane encloses the cell, controls what enters and exits, and is composed of a double layer of phospholipids with embedded proteins.</p>