The seismic waves that travel through Earth’s interior are
known as the P waves and the S waves, these seismic waves have differences,
first the P waves compress and enlarge the foundations(rocks) as they move
through it, while the S waves, shakes the particles of their medium up and down
and side-by-side. P waves can travel through solid granite, magma, water or
even air, while S waves can only travel through solids, they are unable to
travel through fluids. The P waves are the fastest of all known seismic waves,
it is the first seismic wave to register on the seismograph, while the S wave
is the second one.
Multicellular organisms<span> can be much larger and more complex. This is because the cells of the </span>organism<span> have specialised into many </span>differenttypes of cells such as nerve cells, blood cells, muscle cells all performingdifferent<span> functions.</span>
Answer:
<h2>There are two kinds of digestion;
</h2><h2>i) Mechanical and ii) chemical digestion. </h2>
Explanation:
There are two kinds of digestion;
i) Mechanical and ii) chemical digestion.
Mechanical digestion involves physically breaking down the food into smaller pieces. It begins in the mouth as the food is chewed.
In the Stomach
The stomach is a muscular sac with three important functions:
i) It mixes and stores food until it can be further digested.
ii) It secretes chemicals that help break the food into more digestible forms.
iii) It controls the passage of food into the small intestine.
Chemical digestion involves breaking down the food particles into simpler nutrients that can be used by the cells.
In stomach, chemical digestion of mostly proteins occurs Secretions from the stomach lining consist of about two liters of HCl, pepsin, and other many fluids that make up gastric fluids. The fluid is acidic and it helps kill bacteria and many other pathogens. It also produced by the stomach lining usually keeps the acids from damaging the lining. If no mucus or too much acid is produced, peptic ulcers form.
