Science > Biology > Branches of Biology > Animal Anatomy: Scope and Importance Zoology is the branch of biology that focuses on the scientific study of animals. It encompasses a wide range of topics related to the biology, behaviour, evolution, ecology, physiology, and classification of animals, from microscopic organisms to large mammals. Zoologists study various […]
Science > Biology > Zoology > Histology > Epithelium or Epithelial Tissue In this article, we shall study about the epithelium or epithelial tissue. Higher-level organisms have multicellular structure. The cells differ from one another in their shape, size. Cells arise from pre-existing cells by the process of cell division. In multicellular organisms, cells are […]
Science > Biology > Zoology > Criteria for Animal Classification In this article, we shall study the criteria for animal classification. Animals are classified as follows: On the Basis of Number of Germ Layers: Animals in which the cells are arranged in two embryonic layers, an external ectoderm, and an internal endoderm, are called diploblastic […]
Next phylum in the classification of the animal kingdom is phylum Porifera. Members of phylum Porifera are commonly known as sponges. They are the simplest pore-bearing and primitive multicellular organisms. General Characteristics of Phylum Porifera: Habitat: They are aquatic generally marine (few species are found in freshwater). They are found solitary (live alone) as well […]