Tag: human system

• During cellular respiration, glucose and oxygen are changed into energy and carbon dioxide. 
• Therefore, carbon dioxide is released into the atmosphere during the process of cellular respiration. Hence, respiration is responsible for the release of carbon dioxide by animals.

• The free oxygen in the atmosphere comes from photosynthesis by green plants, chiefly the phytoplankton in the ocean.
  
•  Animals and combustion of organic matter absorb the oxygen and release CO2.
• This Carbon dioxide is absorbed by green plants which are exhaled by animals.
•  It’s a dynamic equilibrium. Hence, By observing the interdependence of plants and animals and circulation of oxygen and carbon dioxide we can say that The level of oxygen and carbon dioxide in the atmosphere is kept constant.

• All plants and animals on earth engage in a process called respiration.
• Respiration combines oxygen and the food created during photosynthesis to produce usable energy. 
• One of the byproducts of respiration is CO2,  if plants stop to take up CO2 and stop releasing O2, then plants will stop to convert sunlight into carbohydrates, and die.
• The death of autotrophs would lead to a chain reaction to the death of all higher-order organisms, Hence, Plants and animals help in maintaining the balance of Oxygen and carbon dioxide. 

• All plants and animals on earth engage in a process called respiration.
• Respiration combines oxygen and the food created during photosynthesis to produce usable energy. 
• One of the byproducts of respiration is CO2,  if plants stop to take up CO2 and stop releasing O2, then plants will stop to convert sunlight into carbohydrates, and die.
•  The death of autotrophs would lead to a chain reaction to the death of all higher-order organisms. Hence, Animals will die from the lack of oxygen if plants stop releasing oxygen into the atmosphere.

• Respiration is the movement of oxygen from the outside environment to the cells within tissues and the transport of carbon dioxide in the opposite direction.
•  During cellular respiration, glucose is broken down in the presence of oxygen to produce carbon dioxide and water. 
• The energy released during the reaction is captured by the energy-carrying molecule ATP (adenosine triphosphate). Hence, The energy releasing process in living organisms is respiration.

Physiological respiration is the complete process of respiration which includes physical and biochemical pathway. In physical pathway, there is an exchange of gasses that takes place with the help of respiratory organ i.e., lungs. In biochemical pathway, cells are involved where oxidation of food i.e. glucose takes place in mitochondria and cytoplasm in the presence of several respiratory enzymes. 

Fish brought out of water die due to inability to respire. Fish gills are specialized for extracting oxygen from water and cannot effectively extract oxygen from air. The gills collapse and dry out outside water, making gas exchange impossible.

The spleen plays important roles in regard to red blood cells and the immune system. It removes old red blood cells and holds a reserve of blood, which can be valuable in case of hemorrhagic shock, blood loss and also recycles iron. It purifies the blood and helps the immune system to recognize and attack foreign antibodies and disease. The spleen is composed of the red and white pulp. The white pulp produces and grows immune cell as well as blood cells. On the other hand, the red pulp is responsible for purifying the blood and removing dead or old blood cells.

Essentially, the spleen is a storage container and filter for blood, though it is part of the lymphatic system. In fact, it’s the largest lymph node in the body. One of its tasks is to remove harmful bacteria and viruses in the blood stream. Its other major task is removing or storing certain blood cells. The spleen is composed of two primary regions namely, red pulp and white pulp. The red pulp makes up for little more than three-fourth of the spleen. A region designated marginal zone is a transition area that separates it from the white pulp. Red pulp is red because it has many small cavities (sinusoids) where the spleen stores blood in case of injury or other situations where the body needs extra blood. This blood reserve has a high count of platelets, an essential component for blood coagulation to help stop bleeding. In liver, kidney and heart blood can not be stored. Thus, option A is correct.