Click on the objects to find out and learn about different cells, tissues and organs.

Plant Cell Animal Cell Leaf Cell Ciliated Cell Sperm Cell Root Cell Nerve Cell

Leaf or palisade Cell Function: to make food for the plant Specialisation: it has lots of chloroplasts.

Root Hair Cell Function: to absorb water and nutrients from the soil Specialisation: it has a large surface area and a very thin membrane.

Nerve Cell Function: to send messages around the body. Specialisation: it is very long.

Ciliated Cell Function: to remove dirt from inside of the trachea or windpipe Specialisation: it has little hairs that move.

S PERM CELL Specialisation 2 The head contains a vacuole that contains enzymes which allow it to digest into an egg cell and join with it. Head contains enzymes & nucleus Tail Function Designed to Fertilise eggs. Specialisation 1 A sperm is small and has a long tail that provides movement so it can swim and find an egg cell. Found in the Testes

Although Robert Hooke did not make his own microscopes, he was heavily involved with their overall design. The microscopes were actually made by London instrument maker Christopher Cock, who enjoyed a great deal of success. The first microscope was built in 1670 by a Dutchman called Antony Van Leeuwenhoek. The invention was a huge scientific breakthrough, because for the first time scientists were able to see really, really small things like bacteria. A few years later Robert Hooke improved this microscope by adding another lens, which made small things even bigger, in fact thirty times bigger. When he looked down the microscope at a piece of cork, he saw lots of little honeycomb shaped compartments, which looked like prison cells. Each compartment had a black blob in it, which made him think of a prisoner locked up in a cage. Consequently, he decided to call the compartments cells. Robert Hooke Robert Hooke was well known for being very grumpy because he worked through the night on his ideas and had very little sleep. Perhaps because of his varied interests, Hooke often left experiments unfinished and other scientists then took up from where he left off and claimed sole credit. This sometimes led to quarrels with these colleagues. One work that Hooke finished was his book MICROGRAPHIA, a volume that reveals the immense potential of the microscope. It contains fascinating drawings of the things he saw under the microscope.