6. How are vertebrates different from invertebrates?
Answers
Explanation:
The animal kingdom has been divided into two major groups: Invertebrates (Non-Chordates) and Vertebrates (Chordates). Invertebrates are those that do not possess a vertebral column or backbone while Vertebrates are those where vertebral column or backbone is present
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#Invertebrates
Invertebrates can be simply identified as animals that don’t have a backbone. They are found almost everywhere, from the hottest deserts and the deepest water bodies to the darkest caves and tallest mountains. As stated before, invertebrates are the animals which mainly lack a skeletal system and other developed organs. This means most of them do not possess a rigid body structure and as a result, cannot grow very large. Anatomically, they consist of an open circulatory system where blood flows in an open cavity. Most invertebrates possess a simple respiratory system, with the most common form being gills and trachea.
To compensate for the lack of an internal skeleton, most invertebrates have an external skeleton that protects their soft, inner body. This material is usually made from chitin, a derivative of glucose.
Invertebrates constitute more than 97 per cent of all species in the animal kingdom. The number of invertebrates exceeds more than 2 million species, with more being found almost every other day.
Prominent examples include annelids, arthropods, bivalves, coelenterates, echinoderms, squid, sponges, snails, and octopuses. Some invertebrates possess far superior traits and features to that of vertebrates. For instance, did you know the largest eye in the animal kingdom belongs to the colossal squid – a gigantic invertebrate?
#Vertebrates
Vertebrates are the most advanced of species in the animal kingdom. Members possess a well defined internal skeleton system, which includes a backbone. In humans, the spinal cord runs along the body between the caudal and cranial regions connecting to the nerve tissues. Vertebrates also have more complex and specialized organ systems when compared to invertebrates. Organ systems like the respiratory systems are quite complex, with many additional functions. Even the sensory organs are more advanced, which helps vertebrates adapt to their respective environment.
On average, the overall count of vertebrates existing on planet earth is around 57,000 to 58,000.
Examples of vertebrate include all chordates such as mammals, birds, fish, reptiles, and amphibians etc. The main characteristics of the vertebrates are that members have bilaterally symmetrical bodies and a brain enclosed by a skull
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Answer:
- Vertibrates = vertibral column or backbone present.
- Invertibrates= vertibral column or backbone are not present.
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