Ch. 28 Pregnancy and Human Development
Hoehn, Haynes, Abbott12th EditionMarieb Human Anatomy & PhysiologyISBN: 9780138242732
Not the one you use?Change textbookSelect a different textbook
Table of contents
- Ch. 1 The Human Body: An Orientation25
- Ch. 2 Chemistry Comes Alive24
- Ch. 3 Cells: The Living Units24
- Ch. 4 Tissue: The Living Fabric19
- Ch. 5 The Integumentary System12
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton14
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System25
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue23
- Ch. 12 The Central Nervous System25
- Ch. 13 The Peripheral Nervous System and Reflex Activity30
- Ch. 14 The Autonomic Nervous System16
- Ch. 15 The Special Senses26
- Ch. 16 The Endocrine System26
- Ch. 17 Blood27
- Ch. 18 The Cardiovascular System: The Heart25
- Ch. 19 The Cardiovascular System: Blood Vessels27
- Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues16
- Ch. 21 The Immune System: Innate and Adaptive Body Defenses27
- Ch. 22 The Respiratory System21
- Ch. 23 The Digestive System31
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System26
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System24
- Ch. 28 Pregnancy and Human Development25
- Ch. 29 Heredity11
Hoehn, Haynes, Abbott12th EditionMarieb Human Anatomy & PhysiologyISBN: 9780138242732당신이 사용하는 게 아니라요?교과서 변경
28장, 문제 8
The germ layer from which the epidermis and brain are derived is the
(a) ectoderm
(b) endoderm
(c) mesoderm
검증된 단계별 안내1
Understand that during embryonic development, three primary germ layers form: ectoderm, mesoderm, and endoderm, each giving rise to specific tissues and organs.
Recall that the ectoderm is the outermost germ layer and is responsible for forming structures such as the epidermis (outer skin layer) and the nervous system, including the brain.
Recognize that the mesoderm, the middle layer, forms muscles, bones, and the circulatory system, while the endoderm, the innermost layer, forms internal linings of organs like the digestive and respiratory tracts.
Identify that since the question asks for the germ layer giving rise to both the epidermis and brain, the correct germ layer is the ectoderm.
Conclude that the answer corresponds to option (a) ectoderm, based on the developmental origins of these tissues.
주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Germ Layers
Germ layers are the three primary cell layers formed during early embryonic development: ectoderm, mesoderm, and endoderm. Each layer gives rise to specific tissues and organs in the body, establishing the foundation for organogenesis.
추천 영상:
3:54
Gastrulation: Germ Layer Formation (Days 12-16)
Ectoderm
The ectoderm is the outermost germ layer that develops into the epidermis (skin) and the nervous system, including the brain and spinal cord. It plays a crucial role in forming external structures and neural tissues.
추천 영상:
3:07Specialization of the Ectoderm
Endoderm and Mesoderm
The endoderm forms the inner linings of the digestive and respiratory systems, while the mesoderm gives rise to muscles, bones, and the circulatory system. Understanding their roles helps differentiate which tissues originate from each germ layer.
추천 영상:
2:45Specialization of the Mesoderm
관련 실천