Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

28. Human Development

Introduction to Human Development

Anatomy & Physiology

28. Human Development

Introduction to Human Development

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Multiple Choice

What structure allows blood to flow between the atria in the embryo and fetus?

Foramen ovale

Ductus arteriosus

Ductus venosus

Septum primum

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Verified step by step guidance

Understand the context: In the embryo and fetus, certain structures allow blood to bypass the lungs, which are not yet functional. This is crucial for efficient circulation during development.

Identify the structures involved: The foramen ovale, ductus arteriosus, ductus venosus, and septum primum are all key components in fetal circulation.

Focus on the foramen ovale: This is an opening between the right and left atria in the fetal heart, allowing blood to flow directly from the right atrium to the left atrium, bypassing the lungs.

Consider the function of the other structures: The ductus arteriosus connects the pulmonary artery to the aorta, allowing blood to bypass the lungs. The ductus venosus shunts oxygenated blood from the umbilical vein directly to the inferior vena cava. The septum primum is part of the structure that helps close the foramen ovale after birth.

Conclude with the correct structure: The foramen ovale is the specific structure that allows blood to flow between the atria in the embryo and fetus, facilitating efficient circulation before birth.