<span>Forces can be measured using a device called force meter. The unit of force is called the Newton. It is represented by the symbol N. A force of 2N is smaller than 7N. A force usually results from an interaction.</span>
Epithelial tissue. This type of tissue is made up of cells that are closely packed and arranged in one or more layers. Epithelial tissues cover internal and external body surfaces. They have a high regenerative capacity.and has many functions including, protection, absorption, secretion, sensation and excretion.
Plant cells have a cell wall and cell membrane... Animal cells have a cell membrane but no cell wall
Chemical factors: This is due to internal stimuli. Changes in the blood such as decrease in O2, increase in CO2 and decrease in PH cause impulse in the carotid artery which stimulates the respiratory centers in the medulla and cause breathing.
Mechanical factors: also called external stimuli. Compression of the fetal chest during delivery forces small amount of lung fluid out of the lungs. This increase in pressure in the chest draws air into the lungs.
779 million km exact number is 778,547,200 km.
