Question

Write the features of chordates.

Answer 1

Hint: The phylum Chordata is composed of animals with a flexible rod to support their backsides or dorsal. The phylum name is derived from the Greek root word chord- which means string. Most species within the phylum Chordata are animals with backbones or vertebrates. They are bilaterally symmetric with an inner cavity for true organs.

Complete step-by-step answer:
Phylum Chordata belongs to the Kingdom Animalia and contains all vertebrates, i.e., animals with a spine, and various invertebrates, i.e., organisms without a backbone. They have bilaterally symmetrical bodies and are split into three distinct sub-phyla. This phylum is the most outstanding phylum, as it falls under this phylum for all people and other birds and animals. Notochord presence is the most obvious characteristic of all animals that belong to this phylum. Chordata is a familiar phylum that encompasses the organisms like amphibians (all vertebrates), reptiles, mammals, birds, and fish; sea squirts (tunicates); and lancelets (cephalochordates).
 Features of Chordata are:
i. Existence of notochord paired pharyngeal gill slits and a dorsal hollow nerve cord.
ii. The central nervous system is hollow, dorsal, and single.
iii. The heart is central.
iv. These are triploblastic, bilaterally symmetrical, and coelomate with organ system level of organisation.
v. Have a closed circulatory system.

Note: Vertebrates are members of the kingdom Animalia and the phylum Chordata. Phylum Chordata comprises three subphyla, which are Tunicata or Urochordata, Vertebrata, and Cephalochordata. Subphylum Urochordata and Cephalochordata are often called protochordate.