Invertebrate Development

The largest group of invertebrates.

• Arthropods

• Porifera

• Cnidarians

• Ectoderms

Term for any organism with an external skeleton.

• arthropods

• Cnidarians

• bilateral symmetry

• invertebrates

Invertebrates are the first organisms to be this (having more than one cell).

The most primitive multicellular animals.

• sponges

• jellyfish

• cnidarians

Sponges are classified as these.

• cnidarians

• porifera

• notochords

Porifera means made of these.

The next advancement after animals being multicellular is having these.

• tissues

• endoderm

• ectoderm

• mesoderm

Groups of cells working together to perform a function.

Classification of animals with only cells and tissues.

• cnidarians

• porifera

• cephalization

• asymmetrical

Jellyfish like animals.

• Cnidarians

• Porifera

• Segmented

• Bilateral Symmetry