BELK SCIENCE F/LIFE-MASTRG. BIOL.AC+EBK
6th Edition
ISBN: 9781323907634
Author: BELK
Publisher: PEARSON
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Chapter 23, Problem 6LTB
Summary Introduction
Introduction:
The early embryo differentiates into a structure called the gastrula, which is composed of three-layers, i.e. ectoderm, mesoderm, and endoderm. The process of differentiating into the three-layered structure is called gastrulation.
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Endoderm
Mesoderm
Ectoderm
Match the structures below with the correct germ layers listed above that they are formed from.
Number:
Answer
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Tissues and Organs:
Central Nervous System
Lining of the Digestive Tract
Skin
Skeleton
Which statement does NOT accurately describe somites?
series of tissue blocks
form the ribs and intercostal muscles
paired structures running along either side of the neural tube
derived from neural crest tissue on the ventral surface of the embryo
Complete the following table with the organs/systems that arise from each of the germ layers
Germ Layer
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Mesoderm
Chapter 23 Solutions
BELK SCIENCE F/LIFE-MASTRG. BIOL.AC+EBK
Ch. 23 - Why can two cells with the same DNA have different...Ch. 23 - Prob. 2LTBCh. 23 - Add labels to the figure that follows, which...Ch. 23 - Prob. 4LTBCh. 23 - Prob. 5LTBCh. 23 - Prob. 6LTBCh. 23 - Which hormone helps prepare the uterus for...Ch. 23 - Prob. 8LTBCh. 23 - Prob. 9LTBCh. 23 - Prob. 10LTB
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- Define and describe the main features of the following developmental stages: fertilization, cleavage, gastrulation.arrow_forwardFigure 29.22 Which of the following statements about the parts of an amniotic egg are false? The allantois stores nitrogenous waste and facilitates respiration. The chorion facilitates gas exchange. The yolk provides food for the growing embryo. The amniotic cavity is filled with albumen.arrow_forwardMatch each developmental stage with its description.arrow_forward
- Which of the following are mismatched? (a) endoderm; lining of the digestive tube (b) ectoderm; circulatory system (c) mesoderm; notochord (d) mesoderm; reproductive system (e) ectoderm; sense organsarrow_forwardComplete the following table with the functions of each of the embryonic membranes: Embryonic Membrane Function Yolk sac Chorion & Chorionic villi Allantois Amnionarrow_forwardThe chorion is the _____ and the amnion is the _____.arrow_forward
- Identify major tissues and organs that arise from the ectoderm, the mesoderm, and the endoderm in an embryo.arrow_forwardName two structures derived from each of the three embryonic tissue layers: endoderm, ectoderm, and mesoderm.arrow_forwardAt which embryonic event would one be able to first distinguish a diploblastic embryo from a triploblastic embryo? O gastrulation organogenesis O cleavage O metamorphosis O fertilizationarrow_forward
- After fertization occurs what is the fertilized cell calledarrow_forwardThe chart above shows the structures and processes that form the extra-embryonic and embryonic membranes. Place the number in the blank that corresponds to the correct membrane that forms the system, or the structure that is formed by the membrane. Record the answers in the box in the same order as you entered the numbers from top to bottom. ____ Endoderm ____ Ectoderm ____ Umbilical Cord ____ Chorion ____ Circulatory System ___________arrow_forwardWhich statement below concerning oogenesis is FALSE? About half the oogonia complete mitosis between birth and puberty. An ovum completes its last meiosis after it is fertilized. At birth, girls have already lost the majority of their oocytes. oogenesis begins before birth. OOva develop from stem cells called oogonia.arrow_forward
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Cell Differentiation | Genetics | Biology | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=gwAz_BtVuLA;License: Standard YouTube License, CC-BY