• Biology

    Gas Exchange in fish

    This gas exchange is only for bony fish 🙂 Gills The gills are made up of tiny structures called lamellae. Lamellae are very similar to the villi in the intestine and have a lot of similar features. The role of the lamellae is to increase the surface area of a gill, this will increase the rate of diffusion. Two other properties of the lamellae are: A thin layer of epithelial cells (lining) which provides a short diffusion pathway A good blood supply These both further increase the rate of diffusion. For the fish to respire they need oxygen which they…

  • Biology,  Chemistry

    Water

    Water is a made up of two hydrogen atoms and one oxygen atom as shown in the water molecule below. Water can act as a buffer and has a high specific heat capacity. Why Water Acts as a buffer? A…

  • Climate change

    Ocean acidity

    As most know, Earth contains around 71% water, most of which (96.5%) lie in the oceans and coral reefs. Water is very important for all kinds of life on Earth so when something that important to living organisms changes it…

  • Climate change

    White Coral

    What is coral? Coral is made up of an animal called Polyps. They’re transparent organisms with tentacles and cover the coral’s exoskeleton working together as a unit. The vibrant coral you see is due to the organisms living within the…