Transcript BC Science 8 Chapter 2

2.3 Circulatory and Respiratory
http://www.heartpoint.com/theheart.html
http://www.mydr.com.au/heart-stroke/animation-how-your-heart-pumps
http://www.pbs.org/wgbh/nova/body/map-human-heart.html
http://www.pbs.org/wgbh/nova/eheart/transplantwave.html
http://www.blaufuss.org/
http://www.fi.edu/learn/heart/blood/blood.html
http://www.nobelprize.org/educational/medicine/landsteiner/landsteiner.html - Challenge
http://www.mydr.com.au/addictions/animation-effects-of-smoking
http://www.argosymedical.com/Circulatory/samples/animations/How%20the%20Heart%20Works/index.html
http://www.argosymedical.com/Circulatory/samples/animations/Angioplasty/index.html
http://www.argosymedical.com/Circulatory/samples/animations/CPR/index.html
http://www.argosymedical.com/Circulatory/samples/animations/HIV/index.html
http://www.argosymedical.com/Respiratory/samples/animations/Asthma%20TLC_AZ/index.html
http://highered.mcgrawhill.com/sites/0072495855/student_view0/chapter25/animation__gas_exchange_during_respiration.html
http://video.about.com/asthma/How-Lungs-Function.htm
http://www.youtube.com/watch?v=vu_ONM3Bj9A
Taking a closer look at the heart
Atria – allow the blood to move
from the body to the heart
Ventricles – pump blood out of the
heart
The Heart (Cont’d)
Valves. Each valve allows blood to flow in only
one direction
Blood Flow - Heart
The Circulatory System
Circulatory system is a network of blood vessels
that deliver blood to the body
Arteries – carry oxygenated red blood away from
heart. Blood is under pressure. Aorta is the largest
artery.
Arterioles are small arteries. They end up at
capillaires which are a network of tiny blood vessels
that exchange O2 and CO2
Veins – carry blood to heart
Venules – carry blood from capillaries to veins. Tiny
veins.
Arteries, arterioles, capillaries,
venules, and veins
Components of Blood
Blood – transports oxygen, nutrients and water to
cells and carries carbon dioxide and wastes away.
Also carries specialized cells to fight infections and
heal wounds. 5L in body.
Plasma – 55% of the blood. Clear, yellowish.
Red blood cells – approx 2 million. Carry oxygen
from lungs to cells and carbon dioide away from
cells
White blood cells - fight infection. Numbers
increase when you have an infection
Platelets – clot blood
Blood Components
Respiratory System
Respiratory System – main purpose is inhaling O2
and exhaling CO2
Lungs deliver O2
Air passes past the pharynx through the larynx
(voice box) and down the trachea (airway). The air
splits into 2 bronchi – one for each lung. The
bronchi split into smaller bronchioles until they
reach alveoli where gas exchange happens. There
are millions of alveoli in each lung. Each aveoli is
surrounded in a capillaires for gas exchange.
Inside the Lungs
Heart and Lung
Gas Exchange