Carcinoma are cancers of epithelial tisue, and sarcomas are cancers of connectiv
ID: 3508962 • Letter: C
Question
Carcinoma are cancers of epithelial tisue, and sarcomas are cancers of connective tissue. Are epidermal cancers cancinomas or sarcomas? What about dermal cancers? Explain 4 5 Would you have expected to have found more tactile corpuscles and Merkel discs on the palm or on the posterior shoulder? Why? 6 m in which areas of the body would you expect to find the most Merkel discs and tactile corpuscles? Why? 7 You're discussing a forensic crime scene show with your roommate, who insists that fingerprints are left behind due to the sebum on our fingertips. What do you tell him? (Hint What kind of skin is on the fingertips?) 152 Exploring Anatomy & Physiology in the Laboratory ·Explanation / Answer
4. Epidermal cancers are carcinoma. These are of three types; squamous cell carcinoma, basal cell carcinoma and melanoma.
Dermal cancers are sarcoma.
5. Tactile corpuscles and Merkels discs are expected to be found on the palm because the palms require greater nerve sensitivity.
6. The fingertips, face and lips would contain the most tactile corpuscles and Merkels discs because of their function of differentiating texture, shapes, etc.
7. Fingerprints are left behind because the dermal ridges on the fingers, toes, soles and palm are extensive and they indent the overlying epidermis leading to the formation of epidermal ridges. Fingerprints are left behind because sweat pores open at top of the dermal ridges.