Pulse rate in human
The number of beats per minute is called the pulse rate. A resting person, usually has a pulse rate between 72 and 80 beats per minute
Pulse
Throbbing movement of blood is called the pulse and it is due to the blood flowing in the arteries.72 pulse beats in one minute.
Blood vessels
, Two types of blood vessels, arteries and veins are present in the body. Arteries carry oxygen-rich blood from the heart to all parts of the body. Since the blood flow is rapid and at a high pressure, the arteries have thick elastic walls.
BLOOD
One type of cells are the red blood cells (RBC) which contain a red pigment called haemoglobin. Haemoglobin binds with oxygen and transports it to all the parts of the body and ultimately to all the cells. The blood also has white blood cells (WBC) which fight against germs that may enter our body. The …
Exchange of air in root and leaves in plant
In a plant the roots take in air present in the soil. Leaves have tiny pores called stomata through which they exchange gases. The breakdown of glucose in the plant cells is similar to that in other living beings.
Roots absorb air from the soil
Living cells of the plants, the root cells also need oxygen to generate energy. Roots take up air from the air spaces present between the soil particles
Respiratory organ of fishes
Respiration of Fish gills in fish help them to use oxygen dissolved in water. Gills are projections of the skin. You may wonder how gills help in breathing. Gills are well supplied with blood vessels for exchange of gases.
What is respiratory organ of Earthworm?
Earthworm: that earthworms breathe through their skins. The skin of an earthworm feels moist and slimy on touching. Gases can easily pass through them. Though frogs have a pair of lungs like human beings, they can also breathe through their skin, which is moist and slippery.
Respiratory organ of cockroach
These openings are called spiracles . Insects have a network of air tubes called tracheae for gas exchange
Inhaled air and exhaled air
The percentage of oxygen and carbon dioxide in inhaled and exhaled air. Inhaled air Exhaled air21% oxygen 16.4% oxygen 0.04% carbon dioxide 4.4% carbon dioxide78 % Nitrogen 78 % Nitrogen