Warm – up 8/24-25/2015 Essentials: Interactive Notebooks, Quiz Sheets, Test Warm-Up: I. Go over test and questions missed, reflect on your progress in the class. Come up with 2 goals and questions for yourself and Ms. Hervey. II. Answer question on following page Agenda SWBAT: SWBAT explain the purpose of the integumentary system, the types of membranes, and the layers of the skin Homework: Test Corrections Announcements: Test Corrections due Friday Quiz 35mins post class start…..40 mins deep

What is the most important takeaway you have from this past unit What is the most important takeaway you have from this past unit? What will you still remember in 2-4 years? How did your performance on this test compare to how you expected to do? What did you do well in preparation for this test? Did you do anything different from how you studied for the quizzes? What can you still improve upon for next test? What study skills did you utilize in preparing for this test? Which were most effective? What did Ms. Hervey do well to prepare you? What can Ms. Hervey do differently to prepare you? Unit 1 Reflection

Test Corrections Correct Answer Why it is correct You will receive half points lost I.e = 80% on test, complete test corrections 20pts lost = 10 pts gain NEW GRADE 90% Test Corrections

What type of cells make up the outermost layer of our skin? Why do we have skin? List 2 purposes that you can come up with… List 3 components of the Integumentary system What are the integumentary accessory organs and how do they function Warm Up

QUIZ 5

Why is it important to learn about the integumentary system Why is it important to learn about the integumentary system? Write 2 things in your notes that would be helpful to know about this body system Before we get started…

A few definitions… Epi- PREFIX upon, on top of Hypo- PREFIX under Derm- PREFIX skin Membrane- A thin layer of tissue that covers surfaces or separates regions, structures, or organs of an animal or a plant Keratin – protein that strengthens the epidermis A few definitions…

4 different types: 1. Serous membranes = line body cavities that are not open to the surface. WHY? Keeps things in place, lubricates Example: A serous membrane lines the abdominal cavity. Insane in the membrane

2. Mucous membranes = Line body cavities that open to the surface. WHY? Lubricates, traps and prevents the entry of objects. Examples: Mucous membranes line the nasal, oral, digestive, urinary, and reproductive cavities. Insane in the membrane

3. Synovial membranes= line the joints WHY? Produces fluids to lubricate the joints Examples: Synovial membranes can be found in your knees and shoulders. Insane in the membrane

4. Cutaneous membranes= skin WHY? (see next section) Example: Your skin is a cutaneous membrane composed of stratified squamous epithelial cells & connective tissue Insane in the membrane

Keep my joints from grinding into each other Protect my body from bacteria entering through the nose. Keep my lungs from jamming into my ribs Keep out bacteria from entering through the surface Produce snot Please identify what type of membrane would be used for each of these purposes: CFU

Answers… Keep my joints from grinding into each other Synovial membrane Protect my body from bacteria entering through the nose. Mucous membrane Keep my lungs from jamming into my ribs Serous membrane Keep out bacteria from entering through the surface Cutaneous membrane Produce snot Answers…

2. regulates body temperature 3. prevents water loss 1. protective covering 2. regulates body temperature 3. prevents water loss 4. Houses sensory receptors 5. synthesizes various biochemicals (vitamin D) So Why do we have skin??

regulates body temperature prevents water loss protective covering regulates body temperature prevents water loss Houses sensory receptors synthesizes various biochemicals (vitamin D) So Why do we have skin??

Layers of the Cutaneous Membrane Epidermis : top layer made of stratified squamous epithelial cells. Used for protection. Indents of it make hair and nails No blood vessels Layers of the Cutaneous Membrane

Come Let’s Get Sun Burned MAKE UP YOUR OWN ACRONYM

5 Layers of the Epidermis Most superficial Stratum corneum Stratum lucidum Stratum granulosum Stratum spinosum Stratum basale Most deep

Stratum corneum Top layer of skin 20-30 layers of dead, keratinized cells Provide a barrier due to thickened surface

Stratum lucidum Only found in “thick skin” (palms of hands/soles of feet)

Stratum granulosum Where keratinization begins Cells fill up with keratin cell starts to die

Stratum spinosum Contain keratinocytes – most abundant cell type in epidermis Contain immune cells that help fight infection

Stratum basale Deepest layer of the epidermis Contain keratinocytes Contain melanocytes – produce melanin which affects skin color Contain tactile cells – sensitive to touch and provide sensory signals to brain

Thick skin is only found on your palms, soles of feet, and tips of fingers and toes Contains all 5 layers of epidermis Does not contain hair follicles Thin skin is found everywhere else Contains only 4 layers (no stratum lucidum) Thick vs. Thin Skin

Skin Color All people have about the same number of melanocytes But, melanocyte activity and color of melanin varies UV light stimulates melanocytes to make more melanin Skin Color http://bcove.me/vtksufbw

Freckles represent an increase in melanocyte activity

Friction Ridges Most commonly known as fingerprints Found on the fingers, palms, soles, and toes Due to folds in dermis and epidermis Increase friction so we can better grasp objects and possibly increase skin’s flexibility Each individual has a unique pattern of friction ridges Friction Ridges https://www.youtube.com/watch?v=qX6hFXHDmk4

https://quizlet.com/90757468/flashcards

Create a Visual Diagram of the Layers of the Epidermis Leave room for more layers to be added below and structures within/to the side Include all 5 layers and label Include definitions and example(s) of each Create a Visual Diagram of the Layers of the Epidermis Create flashcards/study tool for the 4 types of membranes

Homework Test Corrections and flashcards. These cards may be used on the test. Homework