Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
Related questions
Question
Q9
Transcribed Image Text:Two embryonic germ layers
are characteristic of Porifera and Cnidaria.
True
False
Expert Solution
Step 1
The embryonic development is characterized by the formation if primary layers of cells, which are known as the Germ Layers. The three germinal layers are Ectoderm, mesoderm and Endoderm (outside to inside). The organisms having all these three layers are termed as Triploblastic organisms. The organisms possessing only Ectoderm and Endoderm, are known as Diploblastic organisms. They lack the middle layer (Mesoderm).
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