28. Pregnancy and Human Development

Fetal circulation

Fetal Development

Fetal Circulation (Before and After Birth) 

 The head of the fetus is nearly as large as the body. 

 At 17–20 weeks (month 5) quickening occurs (the mother feels spontaneous muscular activity of the fetus). 

 Sex is readily detected by observing the genitals. 

 Which of the following occurs 17–20 weeks into pregnancy, during the fetal period? 

 It serves to bypass the nonfunctional lung. 

 It is an opening in the interatrial septum. 

 It allows blood to pass directly from the right atrium into the left ventricle. 

 It is one of the shunt systems encountered by blood entering and leaving the heart before birth. 

 Which of the following statements about the foramen ovale is FALSE? 

 At eight weeks (end of embryonic period) the head is nearly as large as the body, all major brain regions are present, and the first brain waves are generated in the brain stem. 

 Which of the following occurs eight weeks into pregnancy? 

THE STAGES OF FETAL DEVELOPMENT 

HCL Learning | Embryonic Development in Humans

 The function of the ductus arteriosus is to bypass the pulmonary circuit in order to help prevent congestion in the developing lungs. 

 deliver oxygen-poor blood to the placenta 

 deliver oxygen-rich blood to the placenta 

 The function of the ductus arteriosus is to __________. 

 The heart begins to beat at about 3 ½ weeks. All organ systems are laid down in the embryonic period. 

 The heart begins to beat in the developing offspring __________. 

 The fossa ovalis represents the remnants of the atrial fetal shunt. 

 Which structure represents the remnants of the atrial fetal shunt? 

Fetal Development Week by Week Overview

Reproductive System - Pregnancy & Development

Fetal Circulation (Foramen Ovale, Ductus Arteriosus, Ductus Venosus)

Fetal circulation right before birth | Circulatory system physiology 

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1. Introduction to A&P

2. Chemistry

3. Cells

4. Tissues

5. Integumentary System

6. Bones + Skeletal Tissues

7. Skeletal System

8. Joints

9. Muscles and Muscle Tissue

10. Muscular System

11. Nervous Tissue

12. Central Nervous System

13. Peripheral Nervous System

14. Autonomic Nervous System

15. Special Senses

16. Endocrine System

17. Blood

18. Cardiovascular System: the Heart

19. Cardiovascular System: Blood Vessels

20. Lymphatic System

21. Immune System

22. Respiratory System

23. Digestive System

24. Nutrition, Metabolism, Energy Balance

25. Urinary System

26. Fluid and Electrolyte Balance, Acid Base Balance

27. Reproductive System

29. Heredity

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Labor initiation and stages

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Early Embryogenesis: Cleavage, Blastulation, Gastrulation, and Neurulation

Implantation

Placenta Formation and Functions

Extraembryonic Membranes

Gastrulation

Organogenesis and Roles of the Three Primary Germ Layers

Embryonic Development

Fetal period and fetal development

Sperm capacitation and polyspermy

Fertilization

Functional changes in maternal organs and systems during pregnancy

Maternal metabolism and posture during pregnancy

Effects of Pregnancy on the Mother

Preparation of breasts for lactation

Changes in the Mother and Newborn After Delivery

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