Invertebrates and vertebrates are different

According to whether the animal has vertebrae in its body or not, it is divided into two categories: vertebrates and invertebrates. Invertebrates are animals that do not have a vertebral column on the dorsal side, and they are the original form of animals. Its species account for 95% of the total number of animal species.

It is distributed all over the world, and there are about 100 million species in existence. Vertebrates refer to animals with vertebrae and are a subphylum of chordates. The largest number, the most complex structure, and the highest evolutionary status, evolved from mollusks.

The morphological structure is very different from each other, and the lifestyles are very different. Vertebrates are generally symmetrical in shape, and the whole body is divided into three parts: head, trunk, and tail, with relatively complete sensory organs, motor organs, and a highly differentiated nervous system.

01 Nervous system.

The nervous system of vertebrates is a nerve cord composed of tubular nerves, and the hollow tubular nerves can transmit information faster, while invertebrates are still primitive cord-like neural networks, and the speed of transmitting information is much slower.

02 Digestive system.

Most invertebrates have a very simple digestive system, and their organ for excreting metabolic waste products relies on a simple kidney tube, while vertebrates have more complex kidneys, which greatly improve the ability to excrete and metabolize body waste.

03 Circulatory system.

The internal organs of invertebrates are relatively simple, most of them have an open-tube circulatory system, and food and blood are in the body cavity, while vertebrates have a closed-tube circulatory system.

The difference between vertebrates and invertebrates is the difference between invertebrates, composition, body size, and nervous system, for example, vertebrates have a well-developed internal skeleton, an advanced nervous system, and a highly developed brain, while invertebrates are heterotrophic and multicellular, without a cell wall and without a skeleton.

Vertebrates have vertebral columns made up of vertebrae and are divided into five groups, namely mammals, amphibians, fish, birds, and reptiles. Invertebrates do not have vertebral columns made up of vertebrae and are divided into four groups, including coelenterates, annelids, molluscs, and arthropods. Vertebrates are usually larger because they have many support systems that develop faster.

Most invertebrates are small and sluggish, and they can't support a huge body.

Vertebrates are more capable of adapting to all living environments, including land, air and sea. The nervous system is well developed and able to react quickly to changes in the surrounding environment. Invertebrates are mostly aquatic, mostly seafood, with a simple nervous system that can only act intuitively.

The role of both animals

Vertebrates are a subphylum of chordates, with the largest number, the most complex structure, and the highest evolutionary status, which evolved from molluscs. Vertebrates provide humans with meat, eggs, milk and other clothing, leather products such as leather clothing and shoes, and clothing products such as woolen sweaters and down jackets. In addition, many vertebrates can prey on agricultural and forestry pests and pests, which is beneficial to agriculture and forestry.

Jujube vertebrates are the primitive form of animals, and are the general name of all sectors of the animal kingdom except for the subphylum of vertebrates. All invertebrate animals account for more than 95% of all living animals. Snakes in nematomorphs without bristles and without annular muscles achieved by alternating contractions of the longitudinal muscles on both sides.

In seafloor sediments, a certain segment of the body is fixed by expanding the body, and the other part of the body is thinned by the star worm drilled forward.

The evolutionary process of vertebrates is: primitive fishes, primitive amphibians, primitive reptiles, primitive birds, and primitive mammals.

The evolution of vertebrates is a long process. From the earliest armor fish gradually evolved to amphibians, and from then on, the creatures began to evolve from aquatic to terrestrial; From amphibians to reptiles, from reptiles to birds and mammals, and finally from humans to mammals. Obviously, it is this evolutionary process from simple to complex, from lower to higher that has created the highest group of organisms in the animal kingdom.

Difference Between Vertebrates and Invertebrates

The main difference between vertebrates and non-vertebrates is that vertebrates have vertebrals or vertebral columns, while invertebrates do not. Examples of vertebrates are humans, dogs, cats, and birds. Examples of invertebrates are flatworms, mollusks, sea urchins, and insects.

Vertebrates have a well-developed internal skeleton, an outer layer of protective cells**, an advanced nervous system, and a highly developed brain. Invertebrates are heterotrophic and multicellular, have no cell walls, and do not have a skeleton. The features that distinguish vertebrates from their peers are the vertebral bones and notochords of vertebrates.