Digestive System
What is the main job of the digestive system?
To break food down into nutrients the body can use.
What organ pumps blood around the body?
The heart
What is the basic unit of life?
The cell
What is energy?
The ability to do work or cause change.
Where does most nutrient absorption occur?
The small intestine.
What type of blood vessel carries blood away from the heart?
Arteries
What structure controls what enters and leaves the cell?
Cell membrane
What is a renewable energy source?
One that can be replaced naturally (e.g., solar, wind).
What is the long tube that connects the mouth to the stomach?
The oesophagus.
What component of blood carries oxygen?
Red blood cells
What organelle produces energy through respiration?
Mitochondria
What is the energy transformation in a torch? Make sure your included the wasted output too
Chemical -> Electrical -> Light + Heat
What is the main function of the large intestine?
To absorb water and form faeces.
What chamber of the heart pumps oxygenated blood to the body?
The left ventricle.
What is the difference between plant and animal cells in terms of structure?
Plant cells have a cell wall, chloroplasts, and a large vacuole; animal cells don’t.
What law states that energy cannot be created or destroyed?
The Law of Conservation of Energy.
What is the role of the villi in the small intestine?
They increase the surface area for nutrient absorption.
What helps prevent backflow of blood in veins?
Valves
DNA is found inside what part of the cell?
Nucleus
What is energy efficiency?
The percentage of useful energy produced compared to the total energy input.