The cell is the structural and functional unit of living organisms. It was discovered by Robert Hooke in 1665. Cell in Latin means “little room”. Many organisms, such as bacteria, protozoa and ...

Animal cells have a basic structure. Below the basic structure is shown in the same animal cell, on the left viewed with the light microscope, and on the right with the transmission electron ...

The trillions of cells that make up our skeleton age too, and some change in ways that weaken the very structure of our bones ... changes with age that impair their ability to keep our bones ...

Water makes up around 60% of the human body. More than half of this water sloshes around inside the cells that make up organs ...

Their defining feature is the presence of membrane ... a specific function critical to the cell's survival (Table 1). Table 1. The structure and function of key eukaryotic cell structures.

Scientists classify hormones based on general molecular structure ... interaction between these hormones and their cell surface receptors may directly activate intracellular signaling pathways, ...

Learn more about white blood cells, including their function, associated health problems, and possible symptoms you should consider discussing further with a doctor. White blood cells make up a ...

Learn more about these important blood cells, including their functions in the body, the health conditions related to abnormal red blood cell counts, and how a doctor might diagnose and treat them.

The structure and function of key prokaryotic cell structures ... 12 These organisms rely on their cell membrane for structural integrity and often exhibit unique adaptations to survive without the ...

The trillions of cells ... very structure of our bones. Aging and stress can induce cellular senescence in osteocytes, resulting in cytoskeletal and mechanical changes that impair their ability ...