Carbon dioxide exits the blood by the same process, and is exhaled. Adaptations of mammals Description: Display posts from previous: Hi enomis I can see that you would have trouble getting all of that down in 35 minutes. So if you are doing gas exchange then one of your points for each animal would be how they have adapted to have a large surface area for gas exchange – it might help you remember them better. The operculum and buccal cavity work together to maintain a nearly constant flow of water through the mouth and over the gills. Ventilation has two stages; inspiration and expiration, and in this way, mammals can control the rate of gas exchange, therefore they can lead an active lifestyle, because they can increase the rate of gas exchange when they are particularly active such as during exercise.
Therefore the skin is easily kept moist for diffusion. Also, the way the cow regurgitates its food means that the partially digested cellulose is brought back into mouth for mastication, which further increases SA, thus further increasing microbe fermentation efficiency. The haemolymph is pumped through the heart and then flows back around the body diffusing through the ostia back in the heart. The viscous water holds the gas exchange surfaces apart and CO2 is released out of the operculum. Since the blood does not return to the heart for a second pump the blood around the rest of the organism is low pressure.
In order to maintain the concentration gradient fish use the counter current system, so ensuring as efficient gas exchange as possible.
The locust has a series of holes along the side of its body called spiracles, these connect with a series of tubes called the tracheal system. Also the discussion needs to have more ‘biological’ reasons for the diversity ie differences.
The gases are exchanged due to diffusion gradients: So if you are doing gas exchange jcea one of your points for each animal would be how they have ga to have a large surface area for gas exchange – it might help you remember them better.
This is a repeat of info in the description. Insects, however have a tracheal system that takes the gases directly to body cells allowing for more rapid transport than fish and mammals, and this means that insects have the higher metabolic rates needed for their active lifestyles.
The heart contains four chambers, so the oxygenated blood is always kept separate from the deoxygenated blood.
In an open circulatory system, the tissues and organs receive nutrients by direct contact with the hemolymph. External gills usually have a higher surface area but they are less protected.
This gives a high surface area to maximise diffusion. I have been taught by my biology teacher this year that I must follow a strict structure if I want to pass with Merit or Excellence.
Therefore overall the metabolic rate is generally very low and because the insect is not able to change the rate of nutrient uptake or target tissues that have a high energy demand eg for movement, they are generally limited to shorter bursts of exchang. The haemolymph is pumped towards the head using a many chambered dorsal aorta.
Diversity in the structure of each animals is required to meet their nutritional needs. The gill lamellae have a high surface area to exchhange diffusion.
Small projections from the filaments called gill lamellae further increase the surface area. Earthworms — not discussion — no link made between partly digested food and simple digestive system. Insects 1 – air drawn in through spiracles small holes in side of thorax and abdomen nfea into hollow tubes called trachea held open by rings of chitin.
Gas Exchange – WGHS BAP Year 12
The advantage of the system exchanfe internal is that the lungs are always moist and are protected by the ribcage; the worm and the insect by contrast have little protection from physical damage. The blood travels in arteries when oxygenated and in veins when deoxygenated.
I must admit I haven’t been taught any strict structure at all The esay also has cilia, small extensions of the skin that beat upwards to remove dust and other particles. Gas exchange Hey STs! The sizes of the gas exchange systems of these three animals differs according to their body size and metabolic rate.
Any comments would be welcome.
In larger insects air sacs are also present and CO2 is expelled through a pumping body action. Sorry if this is not what u wanted to hear about the discussion……to me is seems more of a repeat of previous given info rather than a discussion exchsnge the reasons why these animals show diversity in the structure and functioning of the digestive systems. Air travels down the trachea to the bronchi.
Don’t worry about the sentence structure – diagrams and bullet points are okay in the first parts! Both paragraphs are valid. Teeth increase SA of food for enzymes in our stomach to work on.
Studyit: BIOLOGY DIVERSITY IN ANIMALS QUESTIONS
The water flow over the gills is opposite to the direction of the blood supply. Hi Maria H Quote: This is because protein quickly rots and is broken down in multiple stages of the digestive system-mouth saliva is acidicsmall intestine — protease and throughout other stages. Enzymes nvea responsible for chemical digestion in each animal.