Human Bio Chapter 1

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Anatomy

the study of the structure

Physiology

the study of the functions

Levels of Organization

1. Atoms
2. Molecules
3. Cells
4. Tissues
5. Organs
6. Organ Systems

Characteristics of Life

1. Organization (levels)
2. Metabolism (all the chemical reactions in the body)
3. Responsiveness
4. Growth
5. Development
6. Reproduction

Homeostasis

body desiring to the stay the same, steady trait

Negative Feedback

Counteract, Opposite to maintain homeostasis (if you're hot, you sweat)

Positive Feedback

Hit setpoint and keep going higher (no regulations). (heart beats faster when you're cut, bleed faster, contractions to push a baby out)

Anatomical Position

feet forward, palms out

Superficial

on the surface, what you see

Deep

inside

Supine

Lying on back

Prone

Lying on belly

Anterior

Cephalic, Trunk, Upper Limb, Lower Limb

How many regions in the abdomen?

Nine

Subdivisions of the abdomen

right upper, left upper, right lower, left lower

Splits body vertically

Medial, saggital plane

Splits body horizontally

transverse, frontal, coronal plane

Serous Membranes

1. Visceral
2. Parietal
3. Pericardial
4. Pleural
5. Peritonel
6. Mesenteries

Visceral

organs

Parietal

lines organ cavity

Pericardial

around heart

Pleural

around lungs

Peritonel

area around abdomen cavity

Mesenteries

membrane that holds together

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