Any one help me... plz give me note of science chapter-10 RESPIRATION IN ORGANISMS... Class-7th
Answers
Process of respiration
The oxygen in the lungs is taken up by the blood.
This oxygen is then transported to all parts of the body.
Blood gives up oxygen to the cells and takes up carbon dioxide, which is sent back to the lungs.
Diffusion
Diffusion is the process of movement of molecules from the area of its lower concentration to the area of its higher concentration without any application of energy.
Diffusion is what happens when you put a drop of ink in water and it slowly mixes with the water uniformly.
The same principle is used for the exchange of gases (breathing) in the animals.
Cellular respiration
When the cells obtain oxygen from blood, they use up this oxygen to burn the food.
Burning of food releases energy which is stored in the form of ATP.
Thus respiration at the cellular level is burning of food using oxygen to get energy.
To know more about Cellular Respiration, visit here.
Aerobic vs. Anaerobic
Aerobic respiration
The type of respiration in which organisms use oxygen for burning food inside the cell is called aerobic respiration.
Anaerobic respiration
Respiration in a cell in the absence of oxygen is called anaerobic respiration.
To know more about aerobic and anaerobic, visit here.
How Do We Breathe?
Components of the respiratory system in humans
The respiratory system of the humans have several parts; Nasal chamber, pharynx, larynx, trachea, bronchi, lungs, diaphragm.
The process of respiration in humans
Respiration in humans starts with the breathing of air through the nose leading to the oxygen to be transferred into the bloodstream by the lungs.
This oxygen is delivered to all the cells, which uses them to burn glucose and generate energy.
Respiration in other organisms
Respiration in other organisms is carried out by special organs.
Frogs and earthworm use their moist skin, fishes use gills and insects have spiracles.
Gaseous exchange in plants
Gaseous exchange in plants occurs through stomata in leaves and through root hair in roots.
The woody stems of plants have lenticels too for the exchange of respiratory gases.