HUMAN ANATOMY
6th Edition
ISBN: 9781260986037
Author: SALADIN
Publisher: MCG
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Chapter 21, Problem 6TYR
Summary Introduction
Introduction:
Blood islands are formed in the embryo during the process of angiogenesis. Spaces between the blood islands open during embryonic development and lead to the formation of hemocytoblasts. The internal spaces between the cells of blood islands proliferate to form the lumen.
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Blood islands first form in the embryonic:- a. spleen. d. liver. b. yolk sac. e. red bone marrow. c. placenta
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The embryo proper develops from thea. inner cell mass.b. trophoblast.c. blastocele.d. yolk sac.
Chapter 21 Solutions
HUMAN ANATOMY
Ch. 21.1 - Why would venous valves be unnecessary in the...Ch. 21.1 - Prob. 1BYGOCh. 21.1 - Answer the following questions to test your...Ch. 21.1 - Answer the following questions to test your...Ch. 21.1 - Prob. 4BYGOCh. 21.1 - Prob. 5BYGOCh. 21.1 - Prob. 6BYGOCh. 21.2 - Prob. 7BYGOCh. 21.2 - Prob. 8BYGOCh. 21.3 - Prob. 1AWYK
Ch. 21.3 - Prob. 9BYGOCh. 21.3 - Prob. 10BYGOCh. 21.3 - Prob. 11BYGOCh. 21.3 - Prob. 12BYGOCh. 21.3 - Prob. 13BYGOCh. 21.4 - Prob. 1AWYKCh. 21.4 - Prob. 14BYGOCh. 21.4 - Prob. 15BYGOCh. 21.4 - Prob. 16BYGOCh. 21.4 - Prob. 17BYGOCh. 21.4 - From the preceding discussion of arteries veins of...Ch. 21.5 - Prob. 18BYGOCh. 21.5 - Prob. 19BYGOCh. 21.5 - Prob. 20BYGOCh. 21 - To test your knowledge, discuss the following...Ch. 21 - To test your knowledge, discuss the following...Ch. 21 - Prob. 21.1.3AYLOCh. 21 - Prob. 21.1.4AYLOCh. 21 - Prob. 21.1.5AYLOCh. 21 - Prob. 21.1.6AYLOCh. 21 - Prob. 21.1.7AYLOCh. 21 - Prob. 21.1.8AYLOCh. 21 - Prob. 21.1.9AYLOCh. 21 - Prob. 21.1.10AYLOCh. 21 - To test your knowledge, discuss the following...Ch. 21 - Prob. 21.1.12AYLOCh. 21 - Prob. 21.1.13AYLOCh. 21 - Prob. 21.2.1AYLOCh. 21 - Prob. 21.2.2AYLOCh. 21 - To test your knowledge, discuss the following...Ch. 21 - To test your knowledge, discuss the following...Ch. 21 - Prob. 21.3.2AYLOCh. 21 - To test your knowledge, discuss the following...Ch. 21 - To test your knowledge, discuss the following...Ch. 21 - To test your knowledge, discuss the following...Ch. 21 - Prob. 21.3.6AYLOCh. 21 - Prob. 21.3.7AYLOCh. 21 - Prob. 21.3.8AYLOCh. 21 - To test your knowledge, discuss the following...Ch. 21 - Prob. 21.3.10AYLOCh. 21 - To test your knowledge, discuss the following...Ch. 21 - To test your knowledge, discuss the following...Ch. 21 - Prob. 21.3.13AYLOCh. 21 - Prob. 21.3.14AYLOCh. 21 - Prob. 21.3.15AYLOCh. 21 - To test your knowledge, discuss the following...Ch. 21 - To test your knowledge, discuss the following...Ch. 21 - Prob. 21.3.18AYLOCh. 21 - Prob. 21.3.19AYLOCh. 21 - Prob. 21.3.20AYLOCh. 21 - Prob. 21.4.1AYLOCh. 21 - To test your knowledge, discuss the following...Ch. 21 - Prob. 21.4.3AYLOCh. 21 - Prob. 21.4.4AYLOCh. 21 - Prob. 21.4.5AYLOCh. 21 - To test your knowledge, discuss the following...Ch. 21 - To test your knowledge, discuss the following...Ch. 21 - Prob. 21.5.2AYLOCh. 21 - To test your knowledge, discuss the following...Ch. 21 - Prob. 21.5.4AYLOCh. 21 - Prob. 21.5.5AYLOCh. 21 - Prob. 1TYRCh. 21 - Prob. 2TYRCh. 21 - Prob. 3TYRCh. 21 - A circulatory pathway in which the blood flows...Ch. 21 - Prob. 5TYRCh. 21 - Prob. 6TYRCh. 21 - Prob. 7TYRCh. 21 - Prob. 8TYRCh. 21 - Prob. 9TYRCh. 21 - Prob. 10TYRCh. 21 - Prob. 11TYRCh. 21 - Prob. 12TYRCh. 21 - Prob. 13TYRCh. 21 - Prob. 14TYRCh. 21 - Prob. 15TYRCh. 21 - Prob. 16TYRCh. 21 - Prob. 17TYRCh. 21 - Prob. 18TYRCh. 21 - Prob. 19TYRCh. 21 - Prob. 20TYRCh. 21 - Prob. 1BYMVCh. 21 - Prob. 2BYMVCh. 21 - Prob. 3BYMVCh. 21 - Prob. 4BYMVCh. 21 - Prob. 5BYMVCh. 21 - Prob. 6BYMVCh. 21 - Prob. 7BYMVCh. 21 - Prob. 8BYMVCh. 21 - Prob. 9BYMVCh. 21 - Prob. 10BYMVCh. 21 - Prob. 1WWWTSCh. 21 - Prob. 2WWWTSCh. 21 - Prob. 3WWWTSCh. 21 - Prob. 4WWWTSCh. 21 - Prob. 5WWWTSCh. 21 - Prob. 6WWWTSCh. 21 - Prob. 7WWWTSCh. 21 - Prob. 8WWWTSCh. 21 - Prob. 9WWWTSCh. 21 - Prob. 10WWWTSCh. 21 - Prob. 1TYCCh. 21 - Prob. 2TYCCh. 21 - What differences would you expect between a sample...Ch. 21 - Prob. 4TYCCh. 21 - Prob. 5TYC
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- Which of the following statements is NOT correct about the umbilical cord? Select one: a. The umbilical cord is formed from the chorion. b. The placenta connects to the embryon via the umbilical cord. c. The umbilical cord consists of two arteries and one vein. d. The umbilical cord is formed from the yolk sac and the allantois.arrow_forwardFetal urine accumulates in the and contributes to the fluid there. a. placental sinus b.yolk sac C. allantois d. chorion e. amnionarrow_forwardChorionic villi develop from:- a. the zona pellucida. b. the endometrium. c. the syncytiotrophoblast. d. the embryoblast. e. the epiblastarrow_forward
- The outer layer of the blastocyst that attaches to the wall of theuterus at implantation is called thea. amnion.b. yolk sac.c. embryoblast.d. trophoblast.arrow_forwardFor the first 8 weeks of gestation, a conceptus is nourished mainly by a. The placenta. b. Amniotic fluid. c. Colostrum. d. Decidual cells. e. Yolk cytoplasmarrow_forwardThe placentaa. develops from the trophoblast.b. allows maternal blood to mix with embryonic blood.c. invades the lacunae of the embryo.d. All of these are correct.arrow_forward
- Match the germ layer on the right with its contribution to the tissues and organs of the embryo, on the left. v connective tissue stroma A. mesoderm v parenchymal cells, e.g., liver B. ectoderm C. mesoderm D. mesoderm E. endoderm F. endoderm vasculature v innervation v epithelium of enteric secretory duct tubes v epithelium of integumentary system G. ectoderm v elastic membranearrow_forwardThe outer layer of the blastocyst that attaches to the wall of the uterus at implantation is called the a. amnion. b. yolk sac. c. cembryoblast. d. trophoblast.arrow_forwardThe umbilical cord connects the developing fetus to thea. mother’s belly button.b. placenta.c. cervix of the mother.d. amnion.arrow_forward
- Identify a characteristic of a fetus in the sixth month of gestation. a. It weighs between 5 and 7 pounds. b. It can open and close its eyes and look in all directions. c. It has fully developed reflex patterns. d. It has a respiratory system that is adequate to survive outside the womb.arrow_forwardDuring the embryonic developmen, the trophoblast will developed into Select one: A. The embryonic disc B. The chorion C. The amnion and amniotic cavity D. The yolk sacarrow_forward1. A placenta vera is formed if a.The placenta is removed during birth. b. The maternal blood bathes the chorionic villi. c. The epithelium of the decidua is not penetrated by the chorion. d. The binucleated chorionic cells penetrate the decidual epithelium. 2. Which of the following does NOT occur during decidualization? a. endometrial capillaries dilate and form sinusoids b. syncytiotrophoblast extend further and form chorionic villi c. endometrial stromal cells accumulate glycogen and lipids d. syncytiotrophoblast is eroded and lacunae are filled with maternal blood 3. Which of the following reasons justifies the midblastula transition? a. The yolk at the vegetal pole slows down the cleavage divisions. b. The embryo has already completed the requirements for initial cleavage. c. The embryo needs to replenish transcripts after using its maternal reserves. d. The embryo needs to replenish its energy after several rounds of fast…arrow_forward
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