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chapter 8: transport in human (HEART heart (roughly conical shape (lies…
chapter 8:
transport in human
BLOOD
red blood cells
contains haemoglobin
transports oxygen from lungs to all parts of the body
circular biconcave shape / flexible
no nucleus
it enables the cell to store more haemoglobin for
transport of oxygen
it will be buldging out
more flexible if the water wants to pass through
white blood cells
plasma
platelets
produce fibrin to heelp blood clot
cell fragments
liquid part that transports material
defends the body against infection and disease by ingesting foreign materials and cellular debris, by destroying infectious agents and cancer cells, or by producing antibodies.
is a fluid tissue surrounding the cell
to help the movement
HEART
roughly conical shape
lies between lungs and behind chest-bone
surrounded by pericardium
VENA CAVA
SUPERIOR & INFERIOR
*blood cannot go up / backwards due to the valves
top will contract FIRST
blood will be pushed down to the VENTRICLES
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PULMONARY CIRCULATION
blood flows to the lungs FIRST then the heart
REOXYGENATED BLOOD
atria - top part of the heart
ventricle - bottom part of the heart
SYSTEMIC CIRCULATION
from the heart the
oxygenated blood leaves the left side of the heart
is distributed to
ALL
parts of the body
EXCEPT lungs
ARTERIES
CARRY BLOOD AWAY FROM THE HEART
vavles are absent
thick, muscular elastic walls
small lumen relative to diameter
BLOOD VESSELS (every single part of the body)
arteries
arterioles
capillaries
venules
veins
carry blood to heart
contains valves
collect blood from capillaries
connects a capillary to a vein
allow materials to be exchanged by diffusion
connect arteries to veins
thinnest
carry blood away from the heart
thickest
, under most pressure pulse
VEINS
valves are present
thin muscular walls with little elastic tissue
