What are Diploblastic animals Class 11?
What are Diploblastic animals Class 11?
Animals in which the cells are arranged in two embryonic layers—external ectoderm and internal endoderm are called diploblastic animals.
What is Diploblastic and Triploblastic animals?
Diploblastic animals have two germinal layers (ectoderm and endoderm) during embryonic development, e.g., poriferans. Triploblastic animals have three germinal layers (ectoderm, mesoderm and endoderm) during embryonic development, e.g., platyhelminthes.
What is the first Diploblastic animal?
Answer: Cnidaria and Ctenophora are considered as diploblastic. Jellyfish, comb jellies, corals and sea anemones are the examples of diploblastic animals. Triploblastic organisms form all three primary germ layers – endoderm, ectoderm and mesoderm – during the gastrulation of the blastula.
Do all Triploblastic animals have a Coelom?
Option A: Eucoelomates are animals who have true coelom. They are also called coelomates. Their body cavity is completely lined with a peritoneum that attaches to organs. All triploblastic organisms have coelomates and are eucoelomate in nature.
What are the body cavities and germ layers of animals?
Animals with three germ layers, called triploblasts, are further characterized by the presence or absence of an internal body cavity called a coelom. Animals with a body cavity may be either coelomates or pseudocoelomates, depending on which tissue gives rise to the coelom.
Do all animals have tissue?
All animals are eukaryotic, multicellular organisms, and almost all animals have a complex tissue structure with differentiated and specialized tissues. Most animals are motile, at least during certain life stages.
Do all animals have a mesoderm?
All animals that have only one plane of symmetry through the body, called bilateral symmetry, form three germ layers. During this process, the primary germ layers, endoderm and ectoderm, interact to form the third, called mesoderm.
Why is a Coelom important?
The coelom allows for compartmentalization of the body parts, so that different organ systems can evolve and nutrient transport is possible. Additionally, because the coelom is a fluid-filled cavity, it protects the organs from shock and compression.