Chapter 26 Flashcards
Hollow ball of cells that fold in on oneself
Blastula
Tissues that are unique to animals
Nervous and muscle
Early development in animals
Zygote -> blastula -> blastopore -> deuterostome or protostome
Mouth forms form blastopore
Protostome
Anus forms from blastopore
Deuterostome
What does the endoderm become
Digestive track
What does the ectoderm become?
Sensory organs, nerves, and skin
What does the mesoderm become?
Muscles, circulatory, and excretory systems
Only animal without symmetry
Sponges
Animal example of radial symmetry
Sea anemone
Anterior
Front
Posterior
Back
Dorsal
Top
Ventral
Bottom
Concentration of sense organs and nerve cells at the front of the body
Cephalization
A fluid filled space that lies between the digestive tract and the body wall
Body cavity
What does the body cavity protect?
Organs
Sponge phylum
Porifera
Meaning of the word Porifera
Pore bearers (gas exchange)
Sessile (definition)
Stationary
Sponge symmetry
Asymmetrical