HOC1: Chapter 2, Tissues

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what are tissues

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Health

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1

what are tissues

several cells with similar structure that join together to accomplish a common function

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2

types of tissues

-muscle -epithelial -nervous -connective

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3

parts of epithelial tissue

epithelia and glands

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4

epethelia

tissues that cover the body and line cavities within the body

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5

function of glands

secrete chemicals

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6

function of epithelial tissues

-protects the body from physical damage -controls what substances enter and leave the body -provide sensory information-secretes various substances

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7

types of epithelia

-simple squamous -simple cuboidal -simple columnar -stratified

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8

simple squamous epithelium

single layer of cells; rapid diffusion of substances because of its thinness

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9

locations of simple squamous epithelium

-found in gas exchanging cavities (alveoli) of the lungs -lining of the abdominal cavity -lines the blood vessels

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10

simple cuboidal epithelium

typically involved with secretion or absorption; surrounds tubules in the kidneys and are present in various secretory glands

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11

simple columnar epithelium

have secretory and absorptive functions; found in the stomach and intestines and in the lining of some of the ducts in the kidneys

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12

stratified epithelia

found where chemical and mechanical protection are needed most

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13

locations of stratified epithelia

-surface of the skin -mouth and throat

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14

connective tissue

most abundant and widespread; found throughout the body

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15

functions of connective tissue

-giving the body and organs the strength to resist external forces (including gravity) -protecting internal organs-maintaining the proper shape of organs (to keep trachea from collapsing) -providing the rigid framework on which muscles can pull, allowing movement

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16

types of connective tissue

-connective tissue proper -cartilage -bone -blood

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17

muscle tissue

allows our body to move

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18

types of muscle tissue

-skeletal muscle (pulls on bones to make us move; voluntary) -cardiac muscle (heart; involuntary) -smooth muscle (found in the walls of hollow organs including blood vessels, airways, GI tract, bladder, and uterus; involuntary)

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19

nerve tissue

-conveys information by electrical signals -concentrated in the brain and spinal cord, but nerves extend throughout the body

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20

amino acids

building blocks of proteins

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21

glucose

simple sugar

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22

biochemistry

the study of molecules of life

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23

lipids

fats

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24

nucleic acids

information carrying molecules

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25

protein

helps build and repair tissues

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26

carbohydrates

serves as an immediate source of energy

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27

water

all life is made of this and needs this to live

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28

DNA

a polymer of nucleotides with the base adenosine, guanine, cytosine, and thymine; where our genes are located

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