Photosynthesis Why There Would Be No People

Photosynthesis Why There Would Be No People Without Plants. Plants play a crucial part in the life circle of animals and human beings and their importance in life cannot be undermined, they contribute to the global food chain as the primary source of food and are the reason that life exists. The lives of all the living organisms and human beings are dependent on plants, hence an explanation as to why plants are placed at the bottom of the food chain.

Apart from the plants, no living creature can derive or make its own food, it is only the plants which are self sufficient and can manufacture their own food for survival (Anne, 2007). Plants through the process called photosynthesis take in water, carbon dioxide and light to produce sugar which is in form of glucose and release a lot of oxygen into the air. Photosynthesis takes place in the chloroplasts using the green pigment called the chlorophyll found in the mesophyll cells of the leaves.

The upper and the lower epidermis parts of the leaf provide protection while gaseous exchange takes place through the microscopic holes found at the lower epidermis called the stomates, it is through the stomates that the plants take in carbon dioxide and let out oxygen during the photosynthesis. Respiration on the other hand is the intake of oxygen from the atmosphere by the living organisms for oxidation of food to produce energy and carbon dioxide is released as a by product.

When human beings and other living creatures respire, they breathe out carbon dioxide into the air and take in oxygen, the released carbon dioxide by the living organisms form part of the carbon dioxide available in the atmosphere for plants intake which aid in photosynthesis (Global change, 2012).

Plants do take in carbon dioxide for photosynthesis to take place and release oxygen primarily by the leaves but there are other parts of the plant that require the intake of oxygen which are not involved in the photosynthetic process, these are majorly found in the root cells. The root cells are responsible for the growth of root hairs which aid the plants in their food uptake and other nutrients from the soil.

These cells are categorized as living cells and they function the same way as the animal cells, they take in oxygen and release carbon dioxide as they burn carbohydrates to release the energy required for the plants to function properly. Placing a plant in an air tight box with all the elements it requires except the source of oxygen deprives it of a major ingredient that it needs to produce the energy it requires to carry out other important functions.

The other plant cells which are not involved in the photosynthesis process do carry out respiration as any other living cell where they take in oxygen and produce carbon dioxide during the night hours; therefore the plant won't survive (Ecochem, 1998). All living things derive their nourishment from the photosynthetic activities of the plants hence the plants are categorized as producers and the living organisms as consumers; animals therefore need plants for food and oxygen which form the basis of life.

In conclusion there would be no people without plants because human lives largely depend on plants for the oxygen that we breathe, there is no other source of oxygen which can support life and it's for this reason that the plants have to exist for the human beings to continue surviving. It is also worth noting that man depends on plants as.