1. Warm up
Please take out 10/15 & 10/18 warm up and your Chapter 6 reading worksheet
When a cell takes in Oxygen and releases CO2 what is that called?
What system supports softer tissue and provides a pathway for blood vessels and nerves?
What is the difference between the central and peripheral nervous system?

2. Integumentary System

5. Skin Protective covering Regulates body temp Stops water loss
Houses sensory receptors
Excretes waste

6. Epidermis
Outer most layer
Composed of squamous cells

7. Shedding New skin formed in the dermis (underlying layer)
As new layers form they are pushed farther from the nutrients in the dermis
Keratin: a protein pumped into dead cells that hardens them
Keratin filled cells are pushed to the surface and eventually flake off
Calluses and wrinkles

8. Melanin Melanocytes: cells in the epidermis that produce melanin
Melanin absorbs UV radiation to prevent mutations and other damage.
More melanin = darker skin
Melanin production is determined by genetics

9. Warm up
Please get out warm ups from 10/15, 10/18 and Chapter 6 reading work sheet
Name the following regions
Head
The back of the knee
The belly button
The top of the foot
The middle of the chest

10. What does the Dermis contain?
Blood vessels
Nerve endings
Hair Follicles
Sebaceous glands
Sweat glands

11. What does the dermis do?
Connect the epidermis to the body and provides it nutrients
What is the importance of the nerve endings?
Enables humans to feel and properly react to the outside world

12. Why are the blood vessels in the dermis so important?
Help regulate body temp
Supply nutrients to the epidermis

13. What do the sebaceous glands produce? What is it?
They produce Sebum which is an oil
Why is Sebum important?
Keeps the hair and skin soft, pliable, and waterproof

14. subcutaneous layer Where is the subcutaneous layer? Beneath the Dermis
What is it composed of?
Loose connective and adipose tissue
What is the importance of the adipose tissue?
Help insulate: conserving heat as well as impeding the entrance of heat from the outside

15. What is a Follicle?
A tube like depression that contains the hair root

16. How is hair produced?
Epithelial cells at the bottom of the follicle divide
As they divide they move upward and eventually die
Your hair is dead epidermal cells

17. Sweat Glands Excocrine glands
Sweat = water, salts, urea, and uric acid (excretory function)

18. Temperature Regulation
What does skin do in response to a low body temp?
The blood vessels in the dermis contract to reduce heat loss from the blood
What does skin do in response to elevated body temperature?
The Blood vessel dilate and sweat glands perspire

19. What initiated interest in the human body?
Our ancestors’ initial interest most likely concerned injuries and illness.
Most healers relied heavily on superstition and notions about magic.
However as the healer tried to help the sick they discovered useful ways of examining and treating the human body such as:
Observes effects of injury (such as gang green)
Discovered herbs and potions that could be used to treat common problems (still used today in what know as Holistic or Alternative medicine.)
Noticed how wounds healed
Examined dead bodies to determine causes of death
Picture from the book De Humani Corporis Fabrica by Andreas Vesalius 1543

20. What kinds of activities helped promote the development of Anatomy and Physiology?
As techniques for accurate observations and performing careful experiments evolved, knowledge of the human body expanded rapidly. At the same time, early medical providers coined many new terms which did the following:
- named body parts
- described body part location
- explained body part function

21. Saturday Night live the Barber
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