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Gas Exchange Lab Report

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All living organisms carry out respiration, which is the production of energy - typically the intake of oxygen and the release of carbon dioxide. This process can be either aerobic or anaerobic. Cells need the energy that is formed during this process to support life processes in order for organisms to survive. Gas exchange is the process by which oxygen is taken from the air and into the bloodstream, all while carbon dioxide is released. This is where the diffusion of important gases (CO2 and O2) into and out of cells occurs, which is essential for respiration to occur. Gases are constantly required for the reactions happening in the cells, and an efficient exchange system is crucial for this to all take place. This system has been adapted …show more content…

Fish use their gills and the flow of water over the gills to take in oxygen and release carbon dioxide. The process begins with the fish opening its mouth as it breathes letting in water and essentially, oxygen. It then closes its mouth and forces the water through the gills and out through the operculum (a flap of skin protecting a fish's gills), thus releasing carbon dioxide. During the process. water flows through the gills in one direction, allowing for more efficient gas exchange. It is important to distinguish that fish have an external gas exchange system, unlike insects and mammals which are …show more content…

The counter current system allows the maximum amount of oxygen to diffuse into the blood from the water available. As the blood flows in the opposite direction to the water, the blood is absorbing more oxygen. Even when the blood reaches the end of the lamella and is approximately 80% saturated with oxygen, it is flowing past water, which is at the beginning of the lamella and is at least 90% saturated. Therefore, even when the blood is highly saturated, having flowed through the length of the lamellae, there is still a concentration gradient and it can continue to absorb oxygen from the water. This counter-current system is important because dissolved gases diffuse faster between fluids with a larger concentration gradient, also there isn't much oxygen in the water, and fish need to absorb enough oxygen to

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This difference in oxygen levels is the difference between a surviving catfish and a dead one. They were both from the same site so they should have not been off by as much as that, showing the imprecision of our class

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In Tube A with the water snail, cellular respiration is being undergone. Tube B, is a aquatic plant so, for this tube, photosynthesis is most likely happening. Tube C has both the water snail, and the aquatic plant which means there is going to be an equilibrium of both processes being the photosynthesis, and cellular respiration. Tube D is the control. BTB or bromthymol blue is a solution used to detect changes in pH. The detection of pH is associated with the amount of CO2 present, meaning that the pH changes with the amount of CO2.

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Oxygen was being consumed and carbon dioxide was being released because the water level in test tube “G” continued to

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The adaptive features of animals: i. Adaptation to live in the habitat lack of oxygen A. Crayfish: Crayfish lives in fresh water stream, which is an aquatic environment. The oxygen level in fresh water upper stream is higher than the lower stream, but the oxygen concentration is still low. The gills of crayfish are much bigger than the size at first glance. They occupied under the cephalothorax carapace in branched-shape and provided a large surface area to volume ratio to carry out gas exchange. Fresh water will be pulled into the cavity by the movement of the “gill bailers”.

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Before getting the goldfish subjects, two beakers were filled with 200 ml fish water and weighed. Four goldfish were then collected gently from the fish tank and each two of them were transferred into one beaker. Each beaker along with fish and water was weighed again to determine the weight of each pair of goldfish. For the control group of each trial, the oxygen chamber was firstly filled with 200 ml fish water; after two goldfish along with 200 ml water were transferred into it, it was sealed in order to prevent oxygen exchange with the ambient environment.

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The stomata are the most critical piece to this process, as this is where CO2 enters and can be stored, and where water and O2 exit. Cellular respiration also known as oxidative metabolism is important to convert biochemical energy from nutrients in the cells of living organisms to useful energy known as adenosine triphosphate (ATP). Without cellular respiration living organisms would not be able to sustain life. This process is done by cells exchanging gases within its surroundings to create adenosine triphosphate commonly known as ADT, which is used by the cells as a source of energy. This process is done through numerous reactions; an example is metabolic pathway.

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That is only because they don’t have a stomach. Have you ever wondered how seahorses eat their food? Seahorses eat their food by using their snout. Yes, it sounds disgusting but their snout is cleaner than our noses. They suck up the food they want to eat and it sucks it up like a vacuum cleaner picking up dust.

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