An instrument that uses visible light and lenses to magnify viewed objects.

Glass or plastic disc that refracts light to increase magnification.

The number of times greater in size the viewed object is compared to its actual size.

A cell that transports oxygen around the body.

Microscopy of human blood cells and blood vessels

Biology

The human circulatory system

The human heart and double circulatory system

Human blood cells and blood vessels

Moving into and out of the blood: diffusion, osmosis and active transport

Diffusion and surface area to volume ratio

The importance of exchange surfaces and transport systems in humans

Pupils will learn how the components of the human nervous system enable us to respond to changes outside and inside our bodies.

Pupils learned about biological molecules that are essential to life, including sugars and other carbohydrates, proteins and lipids, and the role of enzymes in catalysing the chemical reactions in which these substances are used and made.

This unit covers the human circulatory system, its link to the gas exchange system, and the adaptations of the heart, blood vessels, and blood components. It explains transport mechanisms like diffusion, osmosis, and active transport, and the need for exchange surfaces in multicellular organisms.

Transport and exchange surfaces in humans

Physical activity and equipment requiring safe use

Match each part of the microscope to its name.

On this microscope, the eyepiece lens has a magnification of x10, and the objective lens has a magnification of x40. What is the total magnification?

Four students have used a microscope to observe blood cells. Each person has drawn their observations of a red blood cell. Who has produced the best scientific drawing?

A student observed a sample of blood using a light microscope. The structure labelled A is …

These structures observed using a light microscope are an artery and a vein. Which statements explain why structure **B** is a vein?

The photograph shows a piece of apparatus called a light ...

We are made up of tiny living building blocks called ...

Aisha: “Only humans and other animals are made of cells.”

Lucas: “I think animals and plants are made of cells.”

Izzy: “All living organisms are made of cells.”

True or false? Most cells are large enough to see with the unaided eye.

liquid that transports cells and dissolved substances

Match each structure to its function in the human circulatory system.

transported from the digestive system to body cells

transported from body cells to the excretory system

Various substances are transported around the human body in the blood. Match each substance to its correct description.

Starter Quiz