Hemichordata: Classification , Characteristics & Diagrams

-

                                        Hemichordata 

Hemichordata is a marine animal distributing in all over the world named by Delle Chiaje in 1829. The word Hemichordata is coming from the Greek word Hemi means half and Chordae means string. About 90 species of it have been described by scientists till now.
Hemichordata



Classification of Hemichordata -
  • Kingdom - Animalia
  • Phylum - Hemichordata                         
  • class-  Enteropneusta and pterobranchia
  • Higher classification - Deuterostome


Commonly name - Acorn  worms

Habitat - Hemichordata is a marine invertebrate living in the depth of solid substratum like under rocks, in the mud.


hemichordata classification

General Feature -


  •  Hemichordata has some features of the chordate family.

  • They follow bilateral symmetry.

  •  The body is divided into three portions -  collar, trunk, and proboscis lobe.

  •  Reproduction in Hemichordata is of sexual type.

  • The glomerulus is present in the form of an excretory organ.

  •  They have an open circulatory system.

  • Fertilization is external. They have sometimes indirect development through a swimming tornaria larva.  

  • The central nervous system is absent; all the nervous tissue is concentrated in the collar which is connected to the nervous system of the epidermis or outer covering.

  • They have pharyngeal gill slits for respiration.

  • Coelom is divided into three area : protocoel , mesocoel , metacoel .  



Comments

Post a Comment

Popular posts from this blog

Sycon Canal System With Diagram

-
Image
                                     Canal system in Sycon  A sea creature called a sycon, or scypha , is usually found clinging to rocks or other surfaces. These creatures have tube-shaped bodies that open outward with the help of a hole called an Osculum . They have tiny openings called Spiracles and Ostia all over their bodies to let water in. This water flows through canals inside their bodies and comes out through the Osculum, which is a larger opening used for breathing. We'll observe the shape of this canal system, why it is essential for those animals, type of canal system , and  its significance. The Sycon Type Canal system is the unique feature of the phylum Porifera . This system is also known as the  aquiferous canal system . This system supports the significant function of the body like nutrition, respiration, excretion, etc. History Overview -  Gran...
Read more

How Many Types of Eggs In Animals

-
Image
                                             Types of Egg Hello guys! We'll examine a crucial area of zoology in this blog: different varieties of eggs. So let's define reproduction first before moving on to the subject. Reproduction is the biological process in which a parent is responsible to produce their offsprings which may be of their own kind. Reproduction is a must process for every individual for the continuing existence of the species. As we all know, there are many different species on the planet, and each of them has a unique method of egg production and inside the egg they contain yolk . The yolk is composed of proteins, fats, vitamins, and minerals, which are vital for the growth and development of the embryo.  Eggs can be classified into different types based on the amount of yolk they contain. l.  On the basis of the amount of Yolk - Dep...
Read more

Aurelia Aurita Life Cycle: Characterstics, Classification

-
Image
                                             Aurelia  Aurelia aurita is a type of zooplankton found all over the world. They are see-through and don't have eyes, brains, or hearts. They're usually between 2 to 15 inches wide. Even though they prefer being alone, they get carried together in groups called Blooms by wind and water currents. At night, they look like they're moving through the water like jellyfish, which is why they're sometimes called " jellyfish ".  They have four reproductive organs surrounded by tentacles in their top part. Their body color changes based on what they eat, so they can be blue, pink, or other colors. Let's learn more about Aurelia in detail. Details Of Aurelia Diagram -  Body : The center of the diagram would display the jellyfish's bell-shaped body, often called the " umbrella. " Tentacles : Below the bell, you'd see lon...
Read more