Introduction to lab week 4

1
Introduction to lab week 4

• Ex. 11-13 Integumentary, Structure of Bone, and
  Organization of the skeleton

2
Exercise 11 Integumentary

• You are responsible for learning the organs of
  the integumentary system and their functions
• You will also explore the layers of the skin and
  be able to tell the difference between them
  (epidermis, dermis) note hypodermis is not a
  layer of skin, but is associated with the skin
• Youll identify the layers in the epidermis, and
  the structures found in the epidermis and dermis

3
Model of skin

• Learn the following structures
  http//www.yestheyrefake.net/skin_diagram.htm
• Nerves
• Adipose tissue
• Arrector pili muscle
• Eccrine sweat glands
• hair shaft (above the surface), hair follicle
  (tube containing the hair)
• Sebaceous glands-oil (sebum)
• Basement membrane
• Blood vessels
• Dermal papillae
• Epidermis, dermis, hypodermis

4
Layers of epidermis

• Stratum corneum-outermost layer, dead keratinized
  cells
• Stratum lucidum-clear layer of keratinocytes, not
  found in thin skin
• Stratum granulosum-2-5 layers with dark staining
  keratohyalin granules in keratinocytes-important
  layer in waterproofing the skin
• Stratum spinosum-many layers of keratinocytes
• Stratum basale-single layer of cuboidal to
  columnar cells, most mitosis occurs here, has
  keratinocytes, melanoctyes, and Merkel cells too.

5
Integumentary system

• http//www.lab.anhb.uwa.edu.au/mb140/CorePages/Int
  egumentary/Integum.htmINTEGUMENTARY review
• lots of information about the types of skin
  cancers http//www.cancerindex.org/medterm/medtm
  5.htm
• Review stuff http//www.quia.com/jg/366282.html
• Fun quiz http//www.funtrivia.com/flashquiz/index
  .cfm?qid58008

6
Bone structure-Ex. 12

• For this exercise you will describe the long bone
  and identify diaphysis, epiphysis, metaphysis,
  endosteum, medullary cavity, periosteum,
  epiphyseal plate, articular cartilage, red
  marrow, yellow marrow http//homepage.mac.com/myer
  s/misc/bonefiles/bonestruct.html
• http//phs.psdr3.org/science/anatomy/assess/bonequ
  iz.html for a quiz
• OR HERE http//classes.midlandstech.com/bio112/f
  igure7.2long20bone.htm
• You will also distinguish between compact and
  spongy bone http//training.seer.cancer.gov/module
  _anatomy/unit3_2_bone_tissue.html

7
Osteon or Haversian system

• Revisit the slide of the bone from last week or
  go here http//www.med.uiuc.edu/histo/large/atla
  s/objects/725.htm
• Identify all the parts of the osteon including
• Haversian canal or central canal
• Lacuna containing osteocytes or osteoblasts
• Lamella (background)
• Canaliculi
• http//www.trinity.edu/rblyston/bone/intro2.htm

8
Organization of the skeleton-Ex. 13

• This week you will learn to recognize the
  difference in the major bones of the human body
  (there are 206 bones in the human body).
• Youll learn the bones of the axial skeleton and
  the appendicular skeleton
• http//training.seer.cancer.gov/module_anatomy/uni
  t3_5_skeleton_divisions.html
• http//www.bbc.co.uk/science/humanbody/body/factfi
  les/shapeandstructure/femur.shtml click on
  skeleton games

9
Bone markings

• Youll notice a list of bone markings on page 92
  of your lab manual. Go ahead and start working
  on these too!
• Here are the flash cards for practice.
  http//www.flashcardmachine.com/bone-markings.html