Which tissue type or organ is correctly matched with its germ layer of origin?

• A. Connective tissue - Ectoderm
• B. Epithelial tissue - Endoderm
• C. Muscle tissue - Ectoderm
• D. Nervous tissue - Mesoderm

Answer: (B)

Verified step by step guidance

1. Understand the concept of germ layers: In embryonic development, three primary germ layers form, which are the ectoderm, mesoderm, and endoderm. Each of these layers gives rise to different tissues and organs in the body.
2. Identify the origin of connective tissue: Connective tissue primarily arises from the mesoderm, not the ectoderm. This includes bone, blood, and cartilage.
3. Identify the origin of epithelial tissue: Epithelial tissue can originate from all three germ layers, but many internal epithelial tissues, such as those lining the gut, are derived from the endoderm.
4. Identify the origin of muscle tissue: Muscle tissue is derived from the mesoderm. This includes skeletal, cardiac, and smooth muscle.
5. Identify the origin of nervous tissue: Nervous tissue is derived from the ectoderm, which forms the brain, spinal cord, and nerves.