Vertebrates and invertebrates differ mainly in the presence or absence of a basic structure called a notochord at some point in their life cycle but there are many other differences that distinguish these two groups of organisms. Read on to learn the difference between chordate and chordate.
What is Chordates?
The notochord, dorsal hollow neural cord, pharyngeal slit, and anus-postcaudal are four main features that occur at some point in the development of the Chordata It is important to note that some of these features occur in certain animals in embryonic developmental stages. Characteristic features of chordates are briefly discussed below.
What is Non-chordates?
To better understand the difference between wire and wire, let’s look at the basic properties of wire. Chordates are animals that lack the rod-like structure of a notochord.
The genus mainly consists of members of the genera Porifera, Hemichordata, Echinodermata, Mollusca, Arthropoda, Annelida, Askelminthes, Platyhelminthes, Ctenophora, Coelenterata etc. This category is organized at the level of the organ system.
The main elements of this Agreement are set out below.
Difference Between Chordates and Non-chordates
| Chordates | Non-chordates |
| Notochord | |
| Present (at least in one stage in their lifecycle) | Absent. Non-chordates do not have a |
| Cold Blooded/Warm Blooded | |
| Chordates can either be cold-blooded or warm-blooded | All non-chordates are cold-blooded |
| Mode of Respiration | |
| Respiration occurs either through lungs or gills | Non-chordates respire through tracheae, gills or body surface |
| Presence of Haemoglobin | |
| Present | Absent. Hemolymph is present, which is analogous to blood in the vertebrates |
| Germ Layer | |
| Chordates are triploblastic | Non-chordates can either be triploblastic, diploblastic, or neither |
| Symmetry | |
| Chordates are bilaterally symmetric | Non-chordates can either be bilateral, radial, bi-radial, or asymmetrical. |
| Coelom | |
| True coelomates | Can be either true coelomates, acoelomates, pseudocoelomates. |
| Tail (post-anal) | |
| Usually present | Absent |
| Exoskeleton | |
| Present in some animals, such as tortoises. | Present |
| Endoskeleton | |
| Present | Absent |
| Regeneration | |
| Mostly poor | Mostly good |
| Nerve Chord | |
| Dorsal, single, without ganglia | Ventral, double, usually bears ganglia |
| Blood Circulation | |
| Closed | Usually open circulation |
| Anus | |
| It is differentiated and opens before the last segment | Usually absent. If present, it opens on the last segment |
| Brain | |
| Present, dorsal to pharynx in head | Present in some cases, but nowhere as complex as the brain in chordates. |
| Organization | |
| Organ-system | Protoplasmic to organ-system |
| Heart | |
| Ventrally placed | Absent. Dorsal/ lateral placement if present |
| Example | |
| Mammals | Arthropods |
