Respiration and Gas Exchange - KS3 Biology
Overview
This module covers the critical aspects of respiration and gas exchange within the human body and plants, highlighting the processes involved, the systems at work, and the factors affecting these biological functions.
Structure and Function of the Gas Exchange System
- Oxygen intake and carbon dioxide release are key functions.
- Involves:
Respiration
- A chemical reaction releasing energy from glucose.
- Occurs in all living cells.
Breathing Process
- Also known as 'ventilation'.
- Involves movement of gases into and out of the lungs.
Anaerobic Respiration
- Occurs without oxygen.
- Releases energy quickly but less efficiently than aerobic respiration.
- Produces lactic acid as a waste product.
The Circulatory System
- Comprises the heart and blood vessels.
- Transports cells and substances throughout the body.
Effects on the Gas Exchange System
Glucose
- Energy source for cells during respiration.
Photosynthesis
- Chemical process in plants producing food and releasing energy.
Photosynthesis and Respiration in Plants
- Plants use these processes to make food and release energy.
Factors Affecting Photosynthesis
- Influenced by:
- Temperature
- Light intensity
- Carbon dioxide levels
Investigating Photosynthesis
- Experiments can be conducted using pondweed to study light intensity's effect on photosynthesis.
Lung Capacity Measurement
- Vital lung capacity refers to the maximum air intake and outflow.
- Experiments can demonstrate how to measure it.
Additional Resources
External Educational Links