Integument Intro Lecture Student PDF

The Integument: An organ system containing all 4 types of tissues Functions: -protection -thermoregulation -sensation -metabolism  The Integument: An organ system containing all 4 types of tissues Epidermis: stratified squamous epitheli...

The Integument: An organ system containing all 4 types of tissues Functions: -protection -thermoregulation -sensation -metabolism  The Integument: An organ system containing all 4 types of tissues Epidermis: stratified squamous epithelial cells 5 layers – Stratum Corneum (superficial), Lucidum, Granulosum, Spinosum and Dermis: primarily dense irregular Basale connective tissue Hair follicles, sebaceous (oil) and sudoriferous (sweat) glands Arrector pili muscles Blood vessels Hypodermis: adipose tissue (not technically integument) Note: this image will not be provided in the slide deck  The Integument: An organ system containing all 4 types of tissues Epidermis: stratified squamous epithelial cells 5 layers – Stratum Corneum (superficial), Lucidum, Granulosum, Spinosum and Dermis: primarily dense irregular Basale connective tissue Hair follicles sebaceous (oil) and sudoriferous (sweat) glands Arrector pili muscles Blood vessels Hypodermis: adipose tissue (not technically integument) Part 2: Sweating, thermoregulation and Integument Activities Note: Before you participating in part 2, you must fill out the Ethics form linked on Moodle Using our Integument to thermoregulate? - Sweating - evaporation -Arrector pilli -Blood flow  Blood flow and Thermoregulation Vasodilation or vasoconstriction ( see video): changes blood flow to skin and extremities Is blood moved toward or away from the core in a cold environment? How about a warm environment? VS  Activity 1: Sweat Gland Density Sweat glands are not distributed evenly across body Palms and soles sweat in response to stress and exercise but not heat. It is not fully understood why, but is thought to aid in increasing friction between skin and substrate; increasing the toughness of the skin; and increasing tactile sensitivity How do we test? Using iodine and paper impregnated with starch. When iodine, starch and water (from sweat) are combined, it will cause a brown dot on the blotting paper. Each dot= a sweat gland. (a) Schematic representation of the average density of sweat glands in the different parts of the human body(glands/cm 2 ). (Ganesan et al., 2019) Activty 2: How can we test the relationship between sweating , exercise and air flow using the following items: A digital thermometer A damp cloth A fan Need to include a baseline or control in every iteration of experiment  Lab 2 Overview Slide: Part 1: Integument o Work through thin skin slide ( dermis and epidermis will require different magnifications) and label bolded terms o Be able to identify the difference between thin skin and thick skin on a slide Part 2: Thermoregulation o Activity 1: Sweat Gland density  Materials on side bench (iodine, alcohol(ETOH), wipes, blotting squares)  Check results when you are done activity 2 and give a short qualitative explanation if you are not able to do a density count o Activity 2: Surface temperature activity  Make sure Infared Thermometers are set to "surface temp"  Follow directions in lab manual  For exercise components, you may RUN the stairs or around the exterior of the building BEFORE YOU LEAVE: Give your data to your TA or Instructor