In Balanoglossus body is soft and there are no special exoskeletons that can give them protection against external mechanical injuries. Balanoglossus do not have a typical endoskeleton as in other advanced animals in which bony or cartilaginous endoskeleton is present. In Balanoglossus there are some internal structures that are stiff as the endoskeleton, so they … Read more
Balanoglossus is a member of the Hemichordata, Balanoglossus have a soft body and their body have a hollow cavity, it is true coelom or body cavity. In Balanoglossus coelom is enterocoelom, during embryonic development archenteron form the body cavity or coelom, the coelom is lined by a peritoneum membrane. Hollow body cavity spread throughout the … Read more
Body Wall is thick and muscular in Balanoglossus, body wall can be differentiated into three distinct layers from outside to inner side. The body wall is composed of the outermost epidermis middle muscular tissue and innermost peritoneum, we will discuss each layer in detail below. Epidermis: The epidermis in Balanoglossus is glandular and bear cilia, … Read more
Balanoglossus is an important genus of Hemichordata, their body is soft and they are vermiform marine animals, now we will discuss their external morphology in which we focus on the shape of Balanoglossus, size of Balanoglossus, the colour of Balanoglossus, their different regions of the body, collar of Balanoglossus, the trunk of Balanoglossus and proboscis. … Read more
Now we are going to discuss what is Balanoglossus, what is its position in the animal kingdom, and the origin of the name Balanoglossus. What is Balanoglossus: Balanoglossus is a member of Hemichordata and they are marine, they are considered as primitive Chordata thought now they are placed in a separate phylum of invertebrates and … Read more
Now we are going to talk about various topics on phylum Chordata, the definition of Chordata, examples of Chordata, classification of Chordata, origin, and Ancestry of Chordata, diversity of Chordata, similarity, and dissimilarity of Chordata with Non-chordate. Definition of Chordata | What is Chordata: The word Chordata comes from a feature in some animals, notochord, … Read more
Now we will discuss what are Pisces, what are Tetrapoda, similarities between Pisces and Tetrapoda, difference between Pisces and Tetrapoda but before we start we will discuss about the position of Pisces and Tetrapoda in animals. Presence or absence of jaw and paired appendages divide the Vertebrate in two groups, Agnatha and Gnathostomata. Gnathostomata have … Read more
Now we are going to discuss what are Agnatha, what are Gnathostomata, the similarities between Agnatha and Gnathostomata, differences between Agnatha and Gnathostomata but before we start we will discuss their position in the animal kingdom. We divide phylum Chordata into different groups on the basis of various similarities and dissimilarity, presence of cranium or … Read more
In phylum Chordata in some animals have well-defined heads and skulls but some do not have any typical heads, based on this feature we can classify phylum Chordata into two groups – Acrania and Craniata. Those chordates who a specialized head and cranium or brainbox are known as Craniata, Craniata are also known as Euchordata, … Read more
If we study all members of phylum Chordata then we will find great variation in their characters and due to this great variation, it is not so easy to divide them into different groups accurately. But the great effort of different taxonomists enables us to study them in different groups and different taxonomists present different … Read more