Download the transport system

Artery: are blood vessels that carry blood away
from the heart. (Most carry oxygenated blood).
 Vein: are blood vessels that carry blood towards
the heart. (Most veins carry deoxygenated
blood.)
 Heart Valve: it normally allows blood flow in one
direction through the heart. There are four valves
in the mammalian heart.


Transport
materials
throughout the body. It
transports
nutrients,
water, and oxygen to your
body cells and carries
away wastes such as
carbon dioxide that body
cells produce.

The heart is located in the center of your chest
slightly to the left. It's job is to pump your blood
and keep the blood moving throughout your
body.

The coronary arteries deliver blood to the heart
muscle, providing a continuous supply of oxygen
and nutrients needed for it to stay healthy and
function normally.

Blood is supplied to the heart by its own vascular
system, called coronary circulation.

Your left ventricle pumps blood into the main artery
of your body, called the aorta. Close to the heart,
the two main coronary arteries branch off of your
aorta.

The left main coronary artery is a short vessel that
branches into the:
› Left anterior descending artery, which supplies blood to
the front (anterior wall) and part of the side (anterolateral
wall) of the left ventricle, to the top of the left ventricle,
and to most of the wall between the ventricles
(interventricular septum).
› Circumflex artery, which passes behind the heart between
the left atrium and left ventricle and supplies blood to the
side (lateral wall) of the left ventricle. In a small number of
people, the circumflex artery supplies the lower and back
portions of the left ventricle.

The right coronary artery supplies blood to the right
ventricle and then supplies the underside (inferior
wall) and backside (posterior wall) of the left
ventricle.
Atria collect blood from veins.
 Atria contractatrioventricular valves open.
 Blood is pumped into ventricles.
 Ventricle contracts, atrioventricular valves close
and semilunar valves open.
 Blood is pumped into arteries, semilunar valves
close.
 Cycle repeats.

http://www.youtube.com/watch?v=JA0Wb3gc4mE&NR=1
 The heart muscle tissue can contract on its
own , it is called myogenic muscle
contraction.
 Region responsible for initiating each
contraction: pacemaker.

Blood is composed of
plasma, erythrocytes (red
blood
cells),
leukocytes)white blood
cells and platelets.
 Blood carries oxygen and many other
substances around your body.
 Its functions is to transport and defence
against disease.
VEINS AND VENULES
CAPILLARIES
ARTERIES AND ARTERIOLES
Function is to carry blood
from tissues to the heart
Function is to allow exchange of materials between
the blood and the tissues
Function is to carry blood from the heart to the
tissues
Very thin, permeable walls, only one cell thick to
allow exchange of materials
Thick walls with smooth elastic layers to resist high
pressure and muscle layer to aid pumping
Large lumen to reduce resistance to flow.
Very small lumen. Blood cells must distort to pass
through.
Small lumen
Many valves to prevent back-flow
No valves
No valves (except in heart)
Blood at low pressure
Blood pressure falls in capillaries.
Blood at high pressure
Blood usually deoxygenated (except in pulmonary
vein)
Blood changes from oxygenated to deoxygenated
(except in lungs)
Blood usually oxygenated (except in pulmonary
artery)
Thin walls, mainly collagen, since blood at low
pressure
SUBSTANCE
WHERE
REASON
Oxygen
Red blood cells
Transported from lungs to all cells for respiration
Carbon dioxide
Plasma
Transported from all cells to lungs for excretion
Nutrients (e.g. glucose,
amino acids, vitamins,
lipids, nucleotides)
Plasma
Transported from small intestine to liver and from
liver to all cells
Waste products (e.g.
urea, lactic acid)
Plasma
Transported from cells to liver and from liver to
kidneys for excretion
SUBSTANCE
WHERE
REASON
Hormones
Plasma
Transported from glands to target organs
Proteins (eg albumins)
Plasma
Amino acid reserve
Blood clotting factors
Plasma
At least 13 different substances (mainly proteins)
required to make blood clot.
Antigens and
antibodies
Plasma
Part of immune system
Water
Plasma
Transported from large intestine and cells to kidneys
for excretion.
Bacteria and viruses
plasma
Heat
Plasma
Transported from muscles to skin for heat exchange.
Human Body and Mind , BBC URL:
http://www.bbc.co.uk/science/humanbody/bod
y/factfiles/heart/heart.shtml
 Human heart structure ,
URL:http://www.tutorvista.com/content/biology
/biology-ii/transportation/heart.php

A.Six
 B.Five
 C.Four
 D.Three

A.Circulation
 B.Locomotion
 C. Ventriculation
 D.Heart Pump

A.Blood going in wrong direction
 B.Valves in your heart closing
 C.The heart skipping beats
 D.Pacemaker

A.Valves
 B.Ventricles
 C.Blood
 D.Pulmonary arteries

A.Ventricle
 B.Atrium
 C.Septum
 D.The great wall

A.Arteries
 B.Veins
 C.Pipes
 D.Tubas

A.Carries inside carbon dioxide
 B.Help us breathe
 C.To supply blood to the body
 D.Control the blood flow around the body

A.Red blood cells
 B.Carbon dioxide
 C. Oxygen
 D.White blood cells
