Agricultural Science·Plant production · NSSCO 3.1b
The leaf, gas exchange, photosynthesis & respiration
Narrated lesson · press play
When you walk past a maize field near Grootfontein, those still green leaves are secretly running a busy food factory — catching sunlight, breathing in gases and cooking food out of thin air. In this lesson we open up a leaf layer by layer, watch gases move in and out through tiny stomata, meet photosynthesis and why carbon dioxide matters so much, and finish with respiration — how the plant uses that food to live and grow, day and night.
What you'll learn in this lesson
By the end you should be able to (NSSCO Agricultural Science 3.1b):
- Explain how the structure of a leaf is related to its function
- Outline gas exchange by diffusion through stomata
- Describe the significance of carbon dioxide in the process of photosynthesis and the importance of photosynthesis for plant growth
- Discuss the significance of respiration in plant growth
Loading your lesson…
You're watching a free 3-minute preview — create a free account to keep going.
Quick revision
Revise this in 5 minutes
Miss Olivia and Mike talk through the whole topic — with the figure and working drawn live.