The digestive system is made up hollow organs that consists of the mouth, esophagus, stomach, small intestine, large intestine and anus, sequentially. The supplementary organs are the liver, pancreas and the gall bladder.
The food enters first through the (1) MOUTH where mastication or the mechanical breakdown of food particles takes place. After the food is being swallowed it passes through the (2) ESOPHAGUS which is the conduit between the pharynx and (3) STOMACH which secretes acid and enzymes that chemically breaks down food that is termed as chyme. It comprises 10% of the digestion and absorption. The chyme or partially digested food goes to the (4) SMALL INTESTINE where 90% of the digestion and absorption takes place. Its main functions is to absorb the nutrients and minerals from the chyme. (5) The LARGE INTESTINE is where the water from the remaining indigestible food matter is being absorbed. It also transmits the useless waste material from the body where it is excreted through the (6) ANUS
Answer:
b.) earthworms and ants
Explanation:
Pedogenesis is also knowns as Soil formation. This is the process of soil formation due to the regulated effects of place, environment, and history.
The rock from which soil is formed is called the parent rock (bedrock).
The most important life form during the beginning of pedogenesis are earthworm and ants because their burrowing nature in the soil helps in the breakdown of the bedrock. This aids the process of soil formation.
A chemical messenger is any compound that serves to transmit amessage. A chemical messenger may refer to: Hormone, Long rangechemical messenger. Neurotransmitter, communicates to adjacent cells.
The two cateogaries of matter are intensive and extensive.
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Density is mass per unit volume:
d = m/v
In this case the density would be 2kg/10L which works out to 0.2kg/L.
