Blood is a liquid which transports nutrients and waste  around the body.

Absorption is the process of moving nutrients from the digestive system into the blood.

Diffusion is the net movement of particles from an area of higher concentration to an area of lower concentration.

The circulatory system includes the heart and blood vessels through which blood can move.

Absorption and transport of nutrients in humans

Science

The parts of the human digestive system

Digestion and enzymes

Food tests: practical

Bacteria in the human digestive system

Pupils will learn how cells use sugar from digested food as a source of energy.

Pupils learned that particles of substances move within, into and out of cells by diffusion.

This unit examines the human digestive system, including the roles of tissues, organs, enzymes, and beneficial bacteria. It also focuses on evaluating risks, interpreting data, identifying patterns, and suggesting improvements to enhance the reliability of investigations.

Human digestive system

Subjects which particular individuals may be sensitive to, eg, adoption, migration, bereavement or death, divorce, poverty, deprivation.

Depiction or discussion of sensitive content

Which statements explain why the small intestine is long and narrow?

Increasing the surface area of the digestive system {{}} the rate of absorption.

The {{}} increase the surface area of the small intestine.

Which substances are dissolved in plasma?

Which terms describe the movement of nutrients from the digestive system into the circulatory system?

large food molecules into small, soluble nutrients.

Match the start of the sentence with its correct ending.

Match the organ system with its function.

Moving particles in an irregular arrangement.

Moving particles with lots of space between them.

Match the description with the correct state of matter.

The nutrients we obtain from food are used for energy, growth and...

**Andeep** "Digestion is only carried out by enzymes."

**Lucas** "Digestion is the process of breaking down food into nutrients."

**Sofia** "Digestion only takes place in the small intestine."

True or false? Blood flows through the digestive tract.

Moving against a concentration gradient from high to low concentration.

Moving up a concentration gradient from low to high concentration.

Moving down a concentration gradient from high to low concentration.

Which description best defines diffusion?

Starter Quiz

Match the organ system with its function.