Class Summary - Today we went through the answers for the tissues and body membranes test. Then students were shown an episode of Bill Nye the science guy introducing the integumentary system; the skin. Then we, started talking about the integumentary system by talking about the structure / function. We addressed the two regions (dermis and epidermis) and discussed the epidermis. We talked about the stratum corneum the stratum lucidum and the stratum basale. We talked about location and function of each. We also discussed some of the cells in the stratum basale including Langerhans cells, Merkel cells, free nerve endings and melanocytes. we continued the structure of the integumentary system as we talked about the stratum corneum the stratum lucidum and the stratum basale. We talked about location and function of each. We also discussed some of the cells in the stratum basale including Langerhas cells (phagocytize and take microorganisms to the lymphatic system), Merkel cells (feel pressure), free nerve endings (feel pain and temperature) and melanocytes (create melanin which gives our skin color) The dermis is thick and goes deeper than the epidermis. We talked about the components and function of the dermis. We also addressed the hypodermis. This is the subcutaneous tissue. We talked about bedsores as a result of lack of blood flow to the dermis. Students were assigned to label a diagram on the structures of the integumentary system. Students will identify parts of the integumentary system.
Homework - None
Objectives - Students will understand the three main functions of skin. Students will understand the basic structure of the epidermis in the integumentary system.