Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 39.4, Problem 1TYK
Summary Introduction
Introduction:
The word ‘mammals’ is originated from the Latin word ‘mamma’ which means ‘breast’. The characteristic feature of the mammal is that they feed their babies with milk which is produced by the mother’s mammary glands.
The‘placenta’ is the temporary organ that is connected to the wall of the uterus during pregnancy. It provides nutrients and oxygen to the embryo and helps in removing other waste products and carbon dioxide.
Theuterus is a pear-shaped organ that holds and nourishes the growing baby.
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Chapter 39 Solutions
Principles of Biology
Ch. 39.1 - Choose the correct statement. The majority of...Ch. 39.2 - In _________ gametes are released in large numbers...Ch. 39.2 - In which way is gametogenesis similar in males and...Ch. 39.3 - Prob. 1CCCh. 39.3 - Prob. 1TYKCh. 39.3 - Prob. 2TYKCh. 39.4 - Prob. 1BCCh. 39.4 - Prob. 2BCCh. 39.4 - Prob. 1CCCh. 39.4 - Prob. 1TYK
Ch. 39.4 - Prob. 2TYKCh. 39.5 - The three germ layers of triploblasts are...Ch. 39.5 - Choose the correct sequence of events. cleavage...Ch. 39.6 - Under what condition(s) might you expect temporary...Ch. 39.6 - Prob. 2TYKCh. 39 - Prob. 1TYCh. 39 - Prob. 2TYCh. 39 - Spermatogonia are haploid germ cells. d. have...Ch. 39 - Prob. 4TYCh. 39 - Prob. 5TYCh. 39 - Prob. 6TYCh. 39 - A major function of FSH is to stimulate the...Ch. 39 - Prob. 8TYCh. 39 - Prob. 9TYCh. 39 - Cells of the neural crest give rise to the central...Ch. 39 - Prob. 1CCQCh. 39 - Prob. 2CCQCh. 39 - Prob. 3CCQCh. 39 - Describe the major events in animal development...Ch. 39 - Describe the events of the ovarian and uterine...
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- A Survey of Human Development from Fertilization to Birth 4. The gestation of a fetus occurs over 9 months and is divided into three trimesters. Describe the major events that occur in each trimester. Is there a point at which the fetus becomes more human?arrow_forwardPut these human developmental events in order, from earliest to latest a. blastocyst forms d. implantation b. heart begins beating e. breathing practice begins c. gastrulation f. neural tube formsarrow_forward_____ production is continuous from puberty onward in males; _____ production is cyclic and intermittent in females. a. Egg; sperm b. Sperm; egg c. Testosterone; sperm d. Estrogen; eggarrow_forward
- An oocyte lives for only 24 hours after ovulation if it is not fertilized. The trip down the uterine tube, from infundibulum to uterus, takes about 72 hours. In light of this, where do you think fertilization normally occurs?arrow_forwardIn mammals, the male gonad is called the______ . It produces both sperm and the sex hormone________ . Within the male gonad, spermatogenesis occurs within the hollow, coiled structures called_______ .arrow_forwardThe placenta is formed from ________.a. the embryo’s mesenchymal cellsb. the mother’s endometrium onlyc. the mother’s endometrium and the embryo’schorionic membraned. the mother’s endometrium and the embryo’sumbilical cordarrow_forward
- The _______ is an important structure for waste storage in birds and some mammals, but not in humans.A. allantoisB. yolk sacC. placentaD. umbilical cordE. amnionarrow_forwardThe bladder like structure in the amniotic eggarrow_forward"In the early cleavage stages, when the embryo cannot yet feed, the developmental program is driven and controlled by the material deposited in the egg by the mother" is true or false.arrow_forward
- Milk production in the mammary glands is stimulated by a hormone from the pituitary gland called_______ .Another hormone,_______ , stimulates contraction of both the uterine muscles during childbirth and the muscles around the mammary glands that cause milk to be ejected from the glands.arrow_forwardSome Step Involved In The Process of Fertilization. 1. Zygote 2. Morula 3. Oocyte 4. Fertilization 5. Clevage 6. Blastocyte The order in which steps numbered above occur in the process of fertilization is , , , , ,arrow_forwardThe birth starts thanks to increased ... ... release of glucocorticoids from the fetus. ... stretching of the uterine muscles. ... release of oxytocin. ... release of estrogen from the placenta.arrow_forward
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Embryology | Fertilization, Cleavage, Blastulation; Author: Ninja Nerd;https://www.youtube.com/watch?v=8-KF0rnhKTU;License: Standard YouTube License, CC-BY