Health issues

Unfortunately we all get ill from time to time but thankfully our bodies work very hard to ensure we don’t keep catching the same illness over and over again. Different cells have different molecules presented on their surface to help … Read More

The blood

The blood. Fair enough it can gross quite a few people out, but it’s super important to humans and many other animals because it delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products … Read More

The heart and blood vessels

The mass transport system in mammals is the circulatory system. This system uses the blood to transport substances between the heart and tissues. Mass transport systems are used to carry raw materials from specialised exchange organs to the body cells … Read More

The human digestive system

The human digestive system is how we turn what we eat into important nutrients and energy for the body. The food we eat has to be broken down into other substances that our bodies can use. This is called digestion. … Read More

Active transport

Substances need to move around the body of an organism – obviously. To do this they must cross biological membranes. There are a number of ways this can happen, including: passive transport, active processes and bulk transport. Active transport can … Read More

Osmosis

Substances need to move around the body of an organism – obviously. To do this they must cross biological membranes. There are a number of ways this can happen, including: passive transport, active processes and bulk transport. An example of … Read More

Diffusion

Substances need to move around the body of an organism – obviously. To do this they must cross biological membranes. There are a number of ways this can happen, including: passive transport, active processes and bulk transport. Firstly, passive transport. … Read More

Mitosis and the cell cycle

Every cellular organism uses the process of cellular division and yes you’ve guessed it, it’s very important. The two ways that cells can reproduce are mitosis or meiosis. By mitosis a cell splits to create two identical copies of the … Read More

Chromosomes

Chromosomes – so what exactly are they? Well, chromosomes are made from DNA simply. The bad news is there is quite a lot to learn about DNA, the good news is that once you learnt it, that’s a big topic … Read More

Cell differentiation

All multicellular organisms have stem cells (not just humans!) All our tissues originate from stem cells, which are the precursors to the wide variety of cells we end up with at birth. The process by which stem cells divide to … Read More