What is a prokaryotic cell? Prokaryotes are small, single-celled organisms with a simple structure. Unlike other cells, they don’t have a nucleus or other membrane-bound organelles. Instead, most ...

What is a eukaryote? A eukaryote is any cell or organism that possesses a clearly defined nucleus. Eukaryotic cells form the foundation of complex, multicellular life, including apple trees, mushrooms ...

What makes MRK’s images so compelling is the way they make cell biology seem less abstract. Instead of brightly colored diagrams, we get sweeping vistas of the cell and components that look very ...

Learn about the ultrastructure and organelles of animal, plant, fungal and bacterial cells. BBC Bitesize Scotland revision for SQA National 5 Biology.

Find out how vesicles function in the body and what the five main types of vesicle are. We also discuss how vesicles interact with other cells and pathogens.

It's no coincidence that our bodies feel a little creakier as we age. The trillions of cells that make up our skeleton age too, and some change in ways that weaken the very structure of our bones.

Yale researchers and their colleagues in Hungary have discovered that cells in the hypothalamus — an area of the brain that controls functions like hunger and body temperature — play a major role in ...

Higher Structure and function of arteries, capillaries and veins Exchange of materials Blood is pumped from the heart in the arteries. It is returned to the heart in the veins.

Scientists discovered the unique molecular structure, which could have implications in age-related diseases like neurodegeneration. Often referred to as the "powerhouses of the cell," mitochondria ...