Absorption and transport of nutrients in humans
I can describe how the digestive system and circulatory system work together to absorb nutrients and transport them around the body.
Absorption and transport of nutrients in humans
I can describe how the digestive system and circulatory system work together to absorb nutrients and transport them around the body.
Lesson details
Key learning points
- Carbohydrates, proteins and fats in food are broken down by digestion into smaller molecules that can be absorbed.
- Nutrients are absorbed into the blood, which transports them around the body to where they are needed by cells.
- The molecules of some nutrients are small enough to be absorbed into the blood by diffusion.
- Adaptations of the small intestine lining that increase the amount of absorption.
Keywords
Blood - Blood is a liquid which transports nutrients and waste around the body.
Absorption - Absorption is the process of moving nutrients from the digestive system into the blood.
Surface area - Surface area is the area of a surface.
Diffusion - Diffusion is the net movement of particles from an area of higher concentration to an area of lower concentration.
Circulatory system - The circulatory system includes the heart and blood vessels through which blood can move.
Common misconception
That the blood and circulatory system are synonyms.
Blood and circulatory system are key words and introduced as specific concepts.
Equipment
Content guidance
- Depiction or discussion of sensitive content
Supervision
Adult supervision recommended
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Match the organ system with its function.
Pumps blood around the body.
Breaks down food.
Senses the environment.
Gaseous exchange.
Q2.Match the description with the correct state of matter.
Fixed particles that are touching.
Moving particles in an irregular arrangement.
Moving particles with lots of space between them.
Q3.The nutrients we obtain from food are used for energy, growth and...
Q4.Who is correct?
Q5.True or false? Blood flows through the digestive tract.
Q6.Which description best defines diffusion?
Assessment exit quiz
6 Questions
Q1.Which statements explain why the small intestine is long and narrow?
Q2.Increasing the surface area of the digestive system the rate of absorption.
Q3.The increase the surface area of the small intestine.
Q4.Which substances are dissolved in plasma?
Q5.Which terms describe the movement of nutrients from the digestive system into the circulatory system?
Q6.Match the start of the sentence with its correct ending.
large food molecules into small, soluble nutrients.
a concentration gradient into the blood.
cells for energy, growth and repair.