Acoelomata is a subdivision of animals without a true body cavity as a fluid-filled space located between the body wall and digestive tract.

2020年1月9日 · An acoelomate is an animal which lack a coelom, or formal body cavity. True body cavities form only in multicellular organisms with true tissues. Within this group, the eumetazoa, there are the organisms like coral and jellyfish, which have only 2 basic tissues. The triploblastic eumetazoa have 3 tissue types.

Animals in which the coelom is lined by the mesoderm are known as coelomates while those in which the cavity is absent are called acoelomates. In some metazoans, the body cavity is not entirely lined by mesoderm (the endothelial lining found in coelomates). For this reason, they are referred to as pseudocoelomates (do not have a true coelom).

无体腔动物（Acoelomata）是体壁与消化管之间没有体腔而充满中胚层间质的动物的通称，是最原始的两侧对称动物，包括扁形动物门和纽形动物门。 网页 新闻 贴吧 知道 网盘 图片 视频 地图 文库 资讯 采购 百科

The meaning of ACOELOMATA is the Metazoa lacking a true body cavity regarded as a natural group (1) including the sponges and coelenterates and often the lower worms or (2) including only certain worms.

2019年8月19日 · Unlike coelomates (eucoelomates), animals with a true body cavity, acoelomates lack a fluid-filled cavity between the body wall and digestive tract. Acoelomates have a triploblastic body plan, meaning that their tissues and organs develop from three primary embryonic cell (germ cell) layers.

2024年6月9日 · Acoelomates are fascinating organisms with distinct characteristics that set them apart from other animals. One key feature of acoelomates is their lack of a body cavity called a coelom, which differentiates them from coelomates. This absence of a true body cavity means that their organs are in direct contact with the mesoderm tissue.

2017年8月21日 · The main difference between acoelomate and coelomate is that acoelomate is an invertebrate that doesn’t have a coelom whereas coelomate is an invertebrate that has a true coelom. A coelom is a fluid-filled body cavity, which is completely lined by the tissues derived from the mesoderm. 1. What is Acoelomate. 2. What is Coelomate. 3.

1. without a coelom or body cavity. 2. an acoelomate animal. Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved. n. An animal that lacks a coelom.

Animals that have their body cavities filled with fluid are called eucoelomates or coelomates. Their internal organs are suspended in the fluid cavity. Examples include arthropods, annelids, molluscs, hemichordates, echinoderms and chordates. Acoelomates do not have a fluid-filled coelomic cavity. Example – Platyhelminthes.