याद रखने योग्य अवधारणाएँ और फॉर्मूला
Phylum Hemichordata:
• Hemichordates are marine animals that share some characteristics with chordates.
• Understand their body plan, including the proboscis, collar, and trunk regions.
• Study the structure and function of the pharyngeal gill slits, a chordate characteristic.
• Learn about their simple nervous system and circulatory system.
• Hemichordates serve as a link between invertebrates and chordates, so understand their evolutionary significance.
