An organ is made from two or more tissues, which all work together to do a particular job, like the heart in animals or a leaf in a plant. An organ system is made of a group of organs which all ...

This film explains how plants and animals obtain energy from food, highlighting the energy needs of various creatures like ...

This is the first in a six-part series all about the organisation of plants and animals, basically how all the bits of us work together. Here we’re going to mainly focus on the human digestive ...