March 05, 2014

cardiovascular system

like a highway Chap 14 Sec 1

bring oxygen and nutrients

takes away cellular waste

links all parts of body

contains cells to fight disease

heart

Chap 14 Sec 1hollowmuscular

pumps blood

March 05, 2014

atrium

upper chamber of heartChap 14 Sec 1

receives blood

pacemaker

in the right atriumChap 14 Sec 1

a group of heart cells

sends signal that makes heart muscles contract

March 05, 2014

ventricle

lower part of heart

Chap 14 Sec 1

pumps blood out to body

valve

separates atrium and ventricles

Chap 14 Sec 1a flap of tissue that prevents blood from flowing backward

March 05, 2014

artery

one of three kinds of blood vessels

Chap 14 Sec 1

carry blood away from heart

capillary

one of three kinds of blood vessels

Chap 14 Sec 1

smaller than arteries

exchanges substances between blood and cells

walls are one cell thick

March 05, 2014

vein

one of three kinds of blood vessels

Chap 14 Sec 1

blood comes from capillaries

carries blood back to the heart

aorta

artery connected to left ventricle

Chap 14 Sec 1

largest artery in body carries blood to the whole body

March 05, 2014

coronary artery

arteries that carry blood to heart muscles

Chap 14 Sec 1

artery walls are very thick

artery wall made of three layers

pulse

rise and fall of pressure in artery

Chap 14 Sec 1

artery wall expands and contracts

a measurement of heart beats

March 05, 2014

diffusion

material moves from area of higher concentration Chap 14 Sec 1

material moves to are of lower concentration

experiment with eggs, syrup, water and salt water

how blood, oxygen, nutrients and waste are exchanged

perfume in corner of room

blood pressure

blood pushes on blood vessel walls

Chap 14 Sec 1

caused by heart beat

measured with sphygmomanometer