October 27, 2011 Warm October 27, 2011 Warm UpUp►1. Take out Journal1. Take out Journal

►2. Cont. to work on 2. Cont. to work on Weekly VocabularyWeekly Vocabulary

The Integumentary The Integumentary SystemSystem

Hair

Sweat pore

Oil

gland

Sweat

glandFat layerNerve

Blood vessels

IntroductionIntroduction

►What is the largest organ in your body?What is the largest organ in your body?

Your skinYour skin►The integumentary system consists of The integumentary system consists of

your skin, hair, and nails.your skin, hair, and nails.►Much of the information that you Much of the information that you

receive about your environment comes receive about your environment comes through your skin. You can think of through your skin. You can think of your skin as your largest sense organ.your skin as your largest sense organ.

Skin StructuresSkin Structures

Hair

Sweat pore

Oil gland

Sweat gland

Fat layerNerv

e

Blood vessels

Dermis

Epidermis

Skin StructuresSkin Structures► Three layers of the skinThree layers of the skin::

1) 1) EpidermisEpidermis – the outer, thinnest later – the outer, thinnest later of the your skin. of the your skin.

2) 2) DermisDermis – the layer of cells directly – the layer of cells directly below the epidermis. below the epidermis.

This layer is This layer is thicker than thicker than the epidermis and the epidermis and contains contains many blood vessels, many blood vessels, nerves, muscles, oil and sweat nerves, muscles, oil and sweat

glands.glands.

3) 3) Fat layerFat layer – the layer below the – the layer below the dermis that dermis that insulates the body.insulates the body.

Skin StructuresSkin Structures

► MelaninMelanin- Cells in the epidermis - Cells in the epidermis produce the chemical produce the chemical melanin.melanin.-Melanin is a pigment that -Melanin is a pigment that protects your skin and protects your skin and gives it color.gives it color.- The different amounts - The different amounts of melanin produced by of melanin produced by cells results in differences cells results in differences in skin color, as seen in in skin color, as seen in the picture to the right.the picture to the right.

Skin FunctionsSkin Functions

►The skin has many major functions The skin has many major functions which include:which include:

- protection of internal organs- protection of internal organs

- sensory response to your - sensory response to your environmentenvironment

- formation of vitamin D- formation of vitamin D

- regulation of body temperature- regulation of body temperature

- removing wastes from the body- removing wastes from the body

HomeostasisHomeostasis

► HomeostasisHomeostasis is the is the regulation of an regulation of an organism’s internal, life-organism’s internal, life-maintaining conditions maintaining conditions despite changes in its despite changes in its environment.environment.

► The skin aids in The skin aids in maintaining homeostasis maintaining homeostasis by maintaining a constant by maintaining a constant temperature – sweating temperature – sweating and dilating blood vessels and dilating blood vessels when hot and constricting when hot and constricting blood vessels and making blood vessels and making goose bumps when cold.goose bumps when cold.

Human Body System ProjectHuman Body System Project

3 days total to work on3 days total to work on

1= pick out organ to research1= pick out organ to research

2= make wanted poster2= make wanted poster

3= present to class3= present to class

►Your job for this journey is to Your job for this journey is to gather all the information you gather all the information you can about your organ. At the can about your organ. At the end of this cybertrail, you will end of this cybertrail, you will need to whip up a wanted need to whip up a wanted poster to share your finds with poster to share your finds with the other cowboys and the other cowboys and cowgirls in your camp. cowgirls in your camp.

Information to collect…Information to collect…

►Which organ system contains your Which organ system contains your organ? organ? What are the organ's main functions? What are the organ's main functions? How does your organ works with other How does your organ works with other systems to keep the body healthy? systems to keep the body healthy? Which diseases or disorders affects Which diseases or disorders affects your organ? your organ? Can a person live without your organ?Can a person live without your organ?

Trail Sites Trail Sites

►http://sciencespot.net/Pages/kdzhealth.hthttp://sciencespot.net/Pages/kdzhealth.htmlml

►http://www.kidskonnect.com/subject-indehttp://www.kidskonnect.com/subject-index/31-health/337-human-body.htmlx/31-health/337-human-body.html

►http://kidshealth.org/kid/closet/movies/hohttp://kidshealth.org/kid/closet/movies/how_the_body_works_interim.htmlw_the_body_works_interim.html

►LibraryLibrary► Journal notesJournal notes►TextbookTextbook

The Roundup The Roundup

►Share the information you have Share the information you have discovered by completing a Wanted discovered by completing a Wanted poster. poster. The poster should include a picture of The poster should include a picture of your organ and the information your organ and the information outlined in the "Gather Your Information" outlined in the "Gather Your Information" section. section.

Wanted For:)Not helping the __________________________________________ system by not ( main functions) ...

2) Causing ( disease / disorders)...

3) ______________________________ to the humans body ( harm / death) by not...

►The Organ Trail Webquest was created The Organ Trail Webquest was created bybyStacy Baker & Tracy TrimpeStacy Baker & Tracy Trimpe June 2000 June 2000

►Graphics fromGraphics fromWestern Graphics PageWestern Graphics Page && Rattlesnake Jacks'Rattlesnake Jacks'