quiz 20 Flashcards
How does glucose reach all cells so that it can be used for respiration?
carbohydrates are digested into glucose. glucose is absorbed into the bloodstream by the small intestine. The bloodstream carries glucose to all cells
Why do all cells need to respire?
To release energy
Define tissue
A group of similar cells working together to perform a similar function
How does oxygen reach all cells so that it can be used for respiration
Oxygen is inhaled, then absorbed into the bloodstream by the lungs. The bloodstream carries oxygen to all cells
Define organism
A living thing
Put the following the order of size smallest to largest: organ system,tissue,cell,organism and organ
cell,tissue,organ.organ system and organism
Which cells respire?
All cells
Which substances are required for respiration?
Glucose and oxygen
Define respiration
Respiration is a chemical reaction which release energy from glucose
Why is glucose important for respiration?
It contains stored energy which is released during respiration
Name 3 organ systems
Digestive system,circulatory system and respiratory system
Which substance is produced as waste during respiration?
carbon dioxide
Define organ system
A group of organs working together to perform a similar function
Define organ
A group of different tissues working together to perform a similar function
