Salters-Nuffield AS/A level Biology Student Book 1 ActiveBook
Enhance your A Level Biology revision with this comprehensive PDF of flashcards covering the 'Lifestyle, Health and Risk' topic from the Salters-Nuffield specification. Created during Year 12, these clear, concise notes provide key concepts, essential details, and relevant core practicals to suppor...
#
1 .
Network to more through
↳ veins ,
arteries , capillaries
2
. A medium for movement (a fluid ,
eg .
blood) 0 O 0
.
3 controlled directions >
S
↳ vessels have values =
preventing backflow
↳ moved along a pressure gradient
4
. Maintain of speed E
& elastic recoil of vessels
)
↳ contraction of heart
help maintain pressure gradient-speed
ANSWER
, What does it mean by single and
double circulatory system ?
QUESTION
i gle circulatory system
#
↳ The blood flows through the heart only once
completing a full circuit in the body
(eg . Fish
⑳be circulatory system
*
↳ The blood flows through the heart
nice in one
complete circuit
ANSWER
, What are the coronary arteries ?
QUESTION
They are arteries wrapped around the heart
and supply blood to the cardiac muscles
BLOOD- HEART
coronary
arteries
ANSWER
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