~about phylum chordata~
• proto chordates phylum, most advanced animals of kingdom Animalia are included.
• proto chordates in water, land or in air.
• proto chordates body size may be small to large. They are triploblastic, metamerically segmented and having bilateral symmetry.
• proto chordates have true coelom.
• During embryonic stage or for whole life span, they possess notochord. Notochord is a rod like structure which help in support.
• Often, these animals have exoskeleton. In most vertebrates, exoskeleton is well developed.
• The internal skeleton is made up of cartilage and/or bone, living and jointed in nature.
• During embryonic stages or for whole life span, they have pharyngeal gill slits.
• The digestive tract is complete, tubular and have digestive glands. Mouth and cloacal aperture / anus is respectively found anteriorly and posteriorly.
• The Circulatory system is closed type. The heart is present on ventral side to digestive tract.
• chordata is a presence of well developed hepatic portal system.
• chordata Kidney is a main organ of excretory system.
• chordata nerve cord is single, hollow, without ganglia and on dorsal side to the alimentary canal.
• chordata anterior end generally develops into structure called as Brain.
• Phylum chordata.chordata.chordata example.all vertebrate. Subphylums.chordata means.
• Phylum chordata.chordata.chordata example.all vertebrate. Subphylums.chordata means.
• about phylum chordata
• about phylum chordata
• about phylum chordata
• about phylum chordata.