1. HEALTH SCIENCE 12 UNIT TWO : Human Anatomy-Structure & Physiology - Function

2. Levels of Organization
Chemical
Cellular
Tissue
Organs
Organ System
Organism

4. I) BODY POSITIONS:
A) ANATOMICAL POSITION

5. B) SUPINE POSITION:
Lying with face up or when referring to hands, palms up or forward.

6. C) PRONE POSITION:
Lying with face down, or when referring to hands with palms back and back of hand showing

7. II) ANATOMICAL PLANES/sections

8. Name These Body Planes

9. III) ANATOMICAL DIRECTIONS :

14. CAREFUL of “MEDIAL” vs “MEDIAN” !!!

15. Because humans stand upright, our ventral (belly) is our front (anterior. Our backside (Dorsal) is also our behind ( Posterior)

16. DEEP vs. SUPERFICIAL

17. RIGHT vs. LEFT ? ?

18. VIDEO SUMMARY

19. WHAT DO YOU KNOW ? The diaphragm is _________ to the lungs
The nose is on the ____________ surface of the head.
The fingers are __________ to the wrist bones
Your baby toe is ___________ to your big toe
Your Humerus bone is __________ to the Biceps Brachii muscles.
Name something that is CRANIAL to your right eye.

20. What Plane was this MRI image taken on?

21. State Planes that each A and B (CT Scans) were taken on

22. Brain illustration is on what Section ?

23. BODY CAVITIES
Cavities are open spaces enclosed in the body, that houses (filled up with) organs.
These cavities are named according to their positions in the body.

24. BODY CAVITIES

26. BODY DIVISIONS & REGIONS

27. BODY REGIONS

28. HOMEOSTASIS = “Same Standing”
Keeping things in balance:
“A Dynamic State of Equilibrium”
Factors to keep in check: Temperature, Oxygen levels, Ion concentrations, Hormone levels, Blood Sugar, Blood pH etc, etc.

30. NEGATIVE Feedback Loops
In this case “NEGATIVE” refers to the act of NEGATING
(cancelling out) something

31. Components of Feedback Loop
Receptor
monitors a controlled condition
Control center
determines next action
Effector
receives directions from the control center
produces a response that changes the controlled condition

32. THERMOREGULATION

33. Thermoregulation

34. Eg. Homeostasis of Blood Pressure
Pressure receptors in walls of certain arteries detect an increase in BP
blood Pressure = force of blood on walls of vessels
Brain receives input and signals heart and blood vessels
Heart rate slows and arterioles dilate (increase in diameter)
BP returns to normal

35. Eg.Positive Feedback during Childbirth
Stretch receptors in walls of uterus send signals to the brain
Brain releases hormone (oxytocin) into bloodstream
Uterine smooth muscle contracts more forcefully
More stretch, more hormone, more contraction etc.
Cycle ends with birth of the baby & decrease in stretch