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Science presentation

A
Aaron Howard

This document discusses how different terrestrial animals excrete waste and remove water from their bodies. It explains that land animals convert nitrogenous wastes like ammonia into other substances like urea and uric acid to reduce water loss. Invertebrates like insects and arachnids use structures called Malpighian tubules to filter wastes, while vertebrates use kidneys to filter and produce urea or uric acid for excretion. The document also notes that some animals have additional glands to concentrate and remove salt from their bodies.

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Science presentation
Terrestrial animal excretion Land animals have to find a way to get rid of water They must also keep water moist from respiratory Many animals release nitrogen in their waste, a well as ammonia
Terrestrial invertebrates Some terrestrials like annelids and mollusks produce urine or pee through their Nephridia Nephridia- tube like excretory structures that filter body fluid Fluid enters the body through opening called nephrostomes, it leaves through the excretory pores
Terrestrial invertebrates Insects and arachnids, convert ammonia into uric acids Malpighian tubules- tubes within the excretory system that concentrates the waste and then add it to the digestive waste that travels to the gut. as water is absorbed, it forms thick crystals that leave the body (through the anus) the paste contains little water, hence the lack of water loss
Terrestrial Vertebrates Excretion is carried out by the kidneys With mammals and land amphibians ammonia is converted to urea (comes out as urine) For reptiles/birds ammonia is converted to uric acid In birds certain wall cavities absorb the acid forming whitish crystals that come out as waste, hence bird droppings
Terrestrial Vertebrates Kidneys if terrestrial vertebrates cannot excrete concentrated salt Some animals have specialized glands in their head allowing them to concentrate salt and excrete it

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Science presentation

  • 2. Terrestrial animal excretion Land animals have to find a way to get rid of water They must also keep water moist from respiratory Many animals release nitrogen in their waste, a well as ammonia
  • 3. Terrestrial invertebrates Some terrestrials like annelids and mollusks produce urine or pee through their Nephridia Nephridia- tube like excretory structures that filter body fluid Fluid enters the body through opening called nephrostomes, it leaves through the excretory pores
  • 4. Terrestrial invertebrates Insects and arachnids, convert ammonia into uric acids Malpighian tubules- tubes within the excretory system that concentrates the waste and then add it to the digestive waste that travels to the gut. as water is absorbed, it forms thick crystals that leave the body (through the anus) the paste contains little water, hence the lack of water loss
  • 5. Terrestrial Vertebrates Excretion is carried out by the kidneys With mammals and land amphibians ammonia is converted to urea (comes out as urine) For reptiles/birds ammonia is converted to uric acid In birds certain wall cavities absorb the acid forming whitish crystals that come out as waste, hence bird droppings
  • 6. Terrestrial Vertebrates Kidneys if terrestrial vertebrates cannot excrete concentrated salt Some animals have specialized glands in their head allowing them to concentrate salt and excrete it