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Epidermis and Dermis
- epi- top layew
- dermis - bottom
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tendons
muscle to muscle and bone to muscle
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neurons
individual nerve cells
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1st system to develope
nervous
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extrocepters
introcepters
- delevers sensations outside the body (CONTROLLED BY ENVIRONMENT)
- sensations inside the body (AUTOMATIC)
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reflex Arc
simplest form of responce
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survival needs
- nutrients
- oxygen
- water
- normal body temp
- atmospheric pressure
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homeostasis
ability to maintain stable internal conditions when outside world changes constantly
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negative feedback
- output shuts off original stimulus or reduces its intensity
- cause the variable to change in the opposite direction
- returns to "ideal" value
- ex. body temp
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positive feedback
- enhances original stimulus
- goes in same direction as inital disturbance
- ex. labor contractions and blood clotting
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inferior
away from the head
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anterior
toward front of the body
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posterior
toward the back of the body
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medial
toward the middle of the body
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lateral
away from the body
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proximal
closer to the origin of the body or trunk of the body
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Distal
away from the trunk of the body
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superficial
toward body surface
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serous membrane
part of membrane lining the ventral body cavity and outer surfaces of organs
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Epithelial
-what does it do
- characteristics
- covers body cavities
- protects, absorbs, filteration, sensory reception, excretion, secretion
- avascular, close and tightly packed together
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squamous
- type of epithelial
- flat (iregular)
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cuboidal
- type of epithelial
- cube shaped
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columnar
- type of epithelial
- rectangular shaped
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connective tissue
- most aboundant and widley distributed
- supports and reinforces body organs
- includes: cartliage, bone, and blood
- char: extracellular matrix, consisting of ground substance and fibers
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mesenchyme
what cells start out as and it turns into fibroblast, chondroblast, osteoblast, hematopoietic cell, and these turn into different kinds of connective tissue
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