Chapter 1 Health Science

Anatomy

IS

Physiology

DOES

Function Always Follows

FORM

Anotomical Position

The starting point for anatomy (the body)

Planes

Imaginary flat surfaces that describe the human body and it's movements

How many planes are there?

THREE

Saggital Plane

Dividing the right and left sides of the body

Frontal Plane

Dividing the back and front of the body

Transverse Plane

Dividing the top and bottom parts of the bodyAll body motions and segments align with the directions of these planes

Directional Terms

Describe the relationship between body parts

Directional term descriptions are

Paired and opposites and inferior

Cavities hold the body's

Internal Organs

Posterior aka dorsal body cavity, houses

Cranial and Spinal Cavity

Cranial Cavity

Skull protects brain

Spinal Cavity

Spinal column, spinal cord and vertebrae are housed there.

Anterior aka ventral body cavity, abdominopelvic breaks down into

Abdominal and Pelvic cavity

Abdominal Cavity

Containing stomach , liver, organs of digestion, etc.

Pelvic Cavity

Houses reproductive and excretory organs

Abdominal and Pelvic are

Separated by the diaphragm

Atoms and Molecules

Create our body

Cells, Tissues, Organs, and Organ system

Make up our body

Homeostasis

State of regulated physiological balance

Functions in a healthy human body should be

Normal and Painless

Homeostasis Mechanisms are

Negative/Positive feedback, Metabolism/Catabolism, and Metabolic Rate

Negative feedback

Restore system to normal operating function (restores to body's set point)

Examples of Negative feedback are

Sweating, Regulation of blood glucose, and Red blood cell production

Positive Feedback

Accelerates a disruptive process.

Examples of positive feedback are

Accelerating blood clots and Transmitting nerve signals

What is the exception to positive feedback

Childbirth

Metabolism

The chemical reaction constantly going on in the body's cells

What are the types of Metabolism

Anabolism and Catabolism

Anabolism

Builds up

Example of Anabolism is

Bone growth

Catabolism

Breaks down

Examples of Catabolism

Digestion creating ATP and ATP = Energy

Metabolic Rate

Speed the body consumes energy which equals the rate of ATP production

How many calories burned are accounted for by the body's basal metabolic rate - the energy needed to maintain the basic functions of life.

60% - 75%