Practice Question
Identify the three germ layers of embryonic development. Select 3 that apply.
Answer Choices:
Correct Answer:
mesoderm
Rationale:
💠 Mesoderm
💠 The mesoderm is the middle germ layer formed during gastrulation, and it gives rise to the musculoskeletal, cardiovascular, urinary, and reproductive systems.
💠 This layer differentiates into structures such as muscle tissue, bones, cartilage, connective tissue, blood vessels, heart, kidneys, and gonads.
💠 It plays a vital role in providing the support and movement systems of the body, forming the framework that supports internal organs.
💠 In short, the mesoderm is responsible for building the body’s structure and strength, connecting outer and inner tissue systems during development.
💠Ectoderm
💠 The ectoderm is the outermost germ layer, forming the skin, nervous system, and sensory organs.
💠 It develops into important external structures like the epidermis, hair, nails, and tooth enamel, as well as internal neural structures such as the brain, spinal cord, and peripheral nerves.
💠 This layer also gives rise to specialized sensory organs like the eyes and ears, allowing adaptation and communication with the environment after birth.
💠 The ectoderm is crucial for the development of the neural tube, which later becomes the central nervous system (CNS).
💠Endoderm
💠 The endoderm is the innermost germ layer, responsible for forming the lining of the digestive tract, respiratory system, and several internal organs.
💠 It differentiates into the epithelial lining of the lungs, liver, pancreas, urinary bladder, and parts of the thyroid and parathyroid glands.
💠 This layer supports absorption, secretion, and metabolism, enabling internal organs to perform life-sustaining physiological functions.
💠 The endoderm is fundamental for developing vital organ systems essential for digestion, respiration, and hormonal regulation after birth.
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This question is from Examplify NR327_Quiz1_70350 which contains 10 questions.
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Question Details
- Category: RN Nursing Exam(s)
- Subcategory: Examplify Exam(s)
- Domain: Maternal-Child
- Answer Choices: 6