बहुकोशिकीय जानवर कोशिकाओं को ऊतकों और अंगों और आमतौर पर एक पाचन गुहा और तंत्रिका तंत्र में विभेदित करते हैं

metazoa शब्द के हिंदी अर्थ का उदाहरण:

इनकी ऊतकहीनता ही निवह में रहनेवाले कोशिका समुच्यय को मेटाज़ोआ (metazoa) से पृथक्‌ करती है।

चक्रधर मेटाज़ोआ में काफी छोटे जन्तु हैं।

জজজ

बहुकोशिक जीव मेटाज़ोआ (Metazoa) हैं, जिनमें प्रत्येक कार्य के लिये अलग अलग कोशिकासमूह होता है।

* प्राणी या जन्तु या जानवर 'ऐनिमेलिया' (Animalia) या मेटाज़ोआ (Metazoa) जगत के बहुकोशिकीय, जंतुसम पोषण प्रदर्शित करने वाले, और सुकेंद्रिक जीवों का एक मुख्य समूह है।

(२) कृमिविज्ञान (Helminthology) - इसके अंतर्गत मेटाज़ोआ (Metazoa) का अध्ययन होता है।

परंतु नैककोशिन (मेटाज़ोआ) प्राणियों में शरीर की वृद्धि क्रमशील होती है।

metazoa's Usage Examples:

The old criterion by which they and other Metazoa were once distinguished from Protozoa, namely, the differentiation of large and small sexual cells from each other and from the remaining cells of the body, has been broken down by the discovery of numerous cases of such differentiation among Protozoa.

The structural features which the Mollusca do possess in common with other animals belonging to other great phyla of the animal kingdom are those characteristic of the Coelomata, one of the two great grades (the other and lower being that of the Coelentera) into which the higher animals; or Metazoa as distinguished from the Protozoa, are divided.

This is the blastula stage occurring universally in all Metazoa, probably representing an ancestral Protozoan colony in phylogeny.

Metazoa.

The Metazoa form two main branches; one, Parazoa, is but a small unproductive stock comprising only the Phylum Porifera or Sponges; the other, the great stem of the animal series Enterozoa, gives rise to a large number of diverging Phyla which it is necessary to assign to two levels or grades - a lower, Enterocoela (often called Coelentera), and a higher, Coelomocoela (often called Coelomata).

Thus, to begin with, the animal pedigree is divided into two very distinct grades, the Protozoa and the Metazoa.

To the primitive two-cell-layered form, the hypothetical ancestor of all Metazoa or Enterozoa, Haeckel gave the name Gastraea; the em- bryonic form which represents in the individual growth from the egg this ancestral condition he called a " gastrula."

On the ether hand, a survey of the facts of cellular embryology which were accumulated in regard to a variety of classes within a few years of Kovalevsky's work led to a generalization, independently arrived at by Haeckel and Lankester, to the effect that a lower grade of animals may be distinguished, the Protozoa or Plastidozoa, which consist either of single cells or colonies of equiformal cells, and a higher grade, the Metazoa or Enterozoa, in which the egg-cell by " cell division " gives rise to two layers of cells, the endoderm and the ectoderm, surrounding a primitive digestive chamber, the archenteron.

In these features, and in the fact that the gonads are local proliferations of the coelomic epithelium, which have undergone no further changes in the simpler forms, the coelom of this group shows in a particularly clear fashion the general characters of the coelom in the higher Metazoa.

The Metazoa all commence their individual existence as a single cell or plastid, which multiplies itself by transverse division.

metazoa's Meaning':

multicellular animals having cells differentiated into tissues and organs and usually a digestive cavity and nervous system