Breaking down glucose (food) without oxygen to provide available energy for the cells. The glucose reacts with oxygen to produce energy in the form of ATP with carbon dioxide and water as waste products
The process which uses energy to move substances against a concentration gradient or across a partially permeable membrane using a special transport protein.
Made up of many cells
A chromosome is like a packet of coiled up DNA. Humans have 23 pairs of chromosomes. They are in the nucleus of every human cell.
Cells which can divide repeatedly without becoming differentiated and have the capacity to develop into a diverse range of specialised cell types.
The part of a cell that controls the cell function and contains the chromosomes.
A fertilised cell produced as the result of the combination of an ovum and a sperm.
The name for a group of cells that are developing into a fetus. In humans this is from implantation to the 8th week of development
A structure with a particular function which is made up of different tissues.
Cells are specialised and arranged to work together to make a fully-functioning human. Use the animation to see how the body is built up of organ systems, tissues and cells. Look inside the cells to see the structure of chromosomes and the DNA that controls cell activities.
Different parts of the cell carry out different functions. Look at the functions described in the table below. From the drop down list, choose the part of the cell that carries out each function.