The cell is the structural and functional unit of living organisms. It was discovered by Robert Hooke in 1665.

A new structure in human cells has been discovered. The structure is a new type of protein complex that the cell uses to attach to its surroundings and proves to play a key part in cell division.

Functional studies indicate that these metalloproteinases play diverse and important roles in hydra morphogenesis and cell differentiation as well as specialized functions in adult polyps.

An introduction to bones. We discuss their function, the different types of bones in the human body, and the cells that are involved.

Check the latest CBSE Class 9 Science Syllabus 2025–26 with unit-wise weightage, exam pattern, internal assessment details, and excluded topics. Download the detailed syllabus in PDF here.

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.