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Are Agnatha internal fertilized?
Externally
What types of body covering do Agnatha have?
skin
What does the word agnatha mean?
without jaws
What are identifying characteristics of Agnatha?
Agnatha, also known as jawless fish, lack jaws and scales. They have a cartilaginous skeleton, a round mouth, and a single nostril on their head. Agnatha are also known for their ability to produce slime as a defense mechanism.
How do agnatha breath?
by the gill slits
How do class agnatha breathe?
with gills; they're fish!
What are three main groups of fishes?
Class Agnatha
What is agnatha?
jawless fish. not very common today, but they were in the past.
Do agnatha have Bone?
no they have large bonelikes structures called the stonnes.
What is the number of chambers in the agnatha heart?
Agnatha, such as lampreys and hagfish, have a two-chambered heart. The heart consists of an atrium and a ventricle, which pump blood through the circulatory system.
Does agnatha have ectoderm or endoderm?
Agnatha, which includes jawless fish like lampreys and hagfish, have all three germ layers: ectoderm, mesoderm, and endoderm. They exhibit the typical triploblastic organization found in most animals.
What are examples of agnatha?
Examples of agnatha, or jawless fish, include lampreys and hagfish. These fish are characterized by their lack of jaws, paired fins, and scales. They are considered primitive vertebrates and play important roles in marine ecosystems.
