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biology > B4 definitions > Flashcards

B4 definitions Flashcards

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1
Q

alveoli

A

air sacs in lungs that increase sa to increase rate of diffusion for gas exchange

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2
Q

aorta

A

carries oxygenated blood around the body

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3
Q

artery

A

carries blood away from heart

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4
Q

atrium

A

area at top of heart ventricles beneath

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5
Q

bronchi

A

carries oxygen from trachea to alveoli

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6
Q

bronchiole

A

smaller pathways off bronchi

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7
Q

capillary

A

carries blood to tissue and veins, connects arteries and veins

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8
Q

capillary

A

carries blood to tissue and veins, connects arteries and veins

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9
Q

cardiac

A

heart

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10
Q

double circulatory system

A

blood passes through the heart twice for every circuit around the body:

  • the right ventricle pumps blood to the lungs where gas exchange takes place
  • the left venricle pumps blood around the rest of the body
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11
Q

plasma

A

transports substances and blood cells around the body

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12
Q

platelet

A

form blood clots to create barriers to infections

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13
Q

pulmonary

A

lung

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14
Q

vein

A

carries blood to the heart

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15
Q

vena cava

A

brings deoxyginated blood into the heart

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16
Q

ventricle

A

bottom part of heart

17
Q

cuticle

A

makes the leaf waterproof

18
Q

upper epidermis

A
  • single layer f cells
  • protects against water loss
  • transparent to allow light to pass through
19
Q

flaccid

A

soft not turgid

19
Q

flaccid

A

soft not turgid

20
Q

guard cell

A

controls the opening and closing of the stomata

21
Q

mesophyll

A

(pallisade)

  • tightly packed cellls
  • lots of chloroplasts to absorb light for photosynthesis

(spongy)

  • spherical cells
  • lots of air spaces to allow gases to diffuse properly
  • larg sa to volume ratio to increase gas exchange
22
Q

phloem

A

products of phtosynthesis from leafs to roots and other organs

23
Q

stomata

A

tiny openings on the lower surface of the leaf that allow gases to move in and out of the leaf

24
Q

translocation

A

movement of dissolved sugars from the leaves to the rest of the plant through the phloem

25
Q

transpiration

A

water is lost through the stomata by evaporation. this pulls water up from the roots through the xylem and is called transpiration. the constant movement of water up the plant is called the transpiration stream

26
Q

transpiration stream

A

the flow of water through xylem from roots to leaves

27
Q

turgid

A

rigid

28
Q

xylem

A

transports water and minerals from roots to plant

biology (20 decks)

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