ANAT20006 Lecture Notes - Lecture 11: Merocrine, Sebaceous Gland, Sympathetic Nervous System

• School: University of Melbourne
• Department: Anatomy and Neuroscience
• Course: ANAT20006
• Professor: Junhua Xiao

Document Summary

* the integumental system includes skin and structures that go with the skin (hair, nails etc. ) * skin largest organ ~ 2 square metres (makes up 15% of body weight) * skin appendages (hair, nails, subcutaneous tissue, glands) * derived in part from ectoderm (epidermis (outermost layer) derived from ectoderm & dermis derived from mesoderm) * provides protection again physical injury skin is a barrier the outermost layer of skin is dead cells (can take a lot of damage without feeling pain) * skin is a barrier against bacteria (pathogens) * skin provides barrier against water loss (loss of fluid) * skin is important for maintaining body temperature by alteration of blood flow e. g. if hot the vessels dilate and we perspire, if it is cold the vessels constrict. * skin provides protection from uv on sun because of melanocytes.