Excretion in animals

EXCRETION

1. WELCOME

2. EXCRETION IN ANIMALS

3. AMOEBA Amoeba are unicellular eukaryotes with no cell wall. They reproduce using binary fission and move by the use of pseudopodia . Pseudopodia are false feet that extend out, and then the rest of the body follows. Amoeba are found in ponds, rivers and on the surface of leaves and plants. 

4. EXCRETORY ORGANS No special excretory organ, contractile vacuoles function as excretory organs. EXCRETORY PRODUCT Ammonia and excess water in the body.

5. EARTHWORM The earthworms are soft-bodied, segmented worm They are invertebrates, meaning they don't have backbones. Most earthworms appear pink, brown or red in color . An earthworm has a small brain, a digestive system, a reproductive system and a circulatory system with five pairs of hearts. Earthworms breathe through their skin instead of with lungs.

6. EXCRETORY ORGAN Special structures called Nephridia collect excretory products from body cavity and e liminate through pores in the bodt surface. EXCRETORY PRODUCT Urea, ammonia and water.

7. INSECTS Insects are  invertebrates. They have no backbones. Most insects walk, but some can fly and jump. Insects need water, air, and food to live . Insects have three pairs of legs. They use the legs for walking, but sometimes an insect may have a pair of legs that are specially designed for jumping. Insects have two pairs of wings.

8. EXCRETORY ORGAN Malphigian tubules seen along with digestive tract. They separate excretory products and eliminate along with digestive wastes. EXCRETORY PRODUCT Uric acid.

9. FISHES   Gills are important organs for a fish, as they are responsible for respiration . Fish are ectotherms , or cold-blooded. They cannot regulate their body temperature and are dependent on the external environment . Fish have a specialized sense organ called a lateral line. It runs along the length of the body and is situated just under the scales . The lateral line can detect vibrations and movements in the water. Even if there is no light, the fish can detect food and predators, and even navigate with the help of lateral line .

10. EXCRETORY ORGAN Kidney filter the wastes and eliminate directly to water . EXCRETORY PRODUCT Ammonia

11. FROG Frogs belong to a group called vertebrates known as  amphibians. Amphibians are cold-blooded animals that can live in both water and land.   A frog’s skin is usually moist and thin. It does not have scales, hair, or other protective features.  Instead of drinking water, they absorb it through their skin.  Glands  in the skin  secrete  mucus to help keep the skin moist. Frogs also have glands that produce poison to help them escape from  predators.

12. EXCRETORY ORGAN Nitrogenous wastes filtered by kidneys are excreted in the form of urine. EXCRETORY PRODUCT Urea.

13. REPTILES AND BIRDS All reptiles have a backbone, which means they are vertebrates. All reptiles produce eggs. Most reptiles lay hard-shelled eggs, but a few give birth to live young. All reptiles have scales or scutes . Reptiles are  ectothermic  or cold-blooded, which means they cannot control their own body temperature .

14. EXCRETORY ORGAN Kidney filter waste products and eliminate along with digestive waste. EXCRETORY PRODUCTS Uric acid.

15. QUESTIONS What are the importance of excretory organs Which organism have no special excretory organ Which organisms contain malphigian tubules Contractile vacuoles are the speciality of What is the role performed by contractile vacuoles What is nephridia is the excretory products of frog

16. HOMEWORK Draw the structure of amoeba and describe their excretory system. Write the different excretory products present in earthworm. Tabulate different organisms with their excretory organs and excretory products

17. THANK YOU