http://www.youtube.com/watch?v=57wrBvy
p4jQ
● Two circuits that blood flows through
pulmonary circuit-takes oxygen-depleted blood
from the heart to the lungs, and brings oxygen rich
blood back to the heart
○ systemic circuit-brings oxygen rich blood to the
rest of the body
○
-Tubes that take oxygen rich blood away from the heart
-Aorta is the biggest artery in the body
-lined with epithelial tissue wrapped with smooth
muscle connector tissues
-Carry de-oxygenated blood back to the heart
-Valves are present to prevent the backward flow of
blood
-Also lined with epithelial tissue wrapped with smooth
muscle connector tissues
-very thin tubes that bring oxygenated blood to every
cell in the body
-a very thin layer of epithelial tissue encased in a moist
membrane
-allows diffusion of nutrients and oxygen into the blood
and waste out of the blood
-also known as Erythrocytes
-carry oxygen from lungs to all the tissues of the body
-hemoglobin(a protein in red blood cells) temporarily
stores oxygen for transport
-produced in bone marrow
-lose mitochondria and nuclei as matures which gives
them their indented shape
-also known as Leukocytes
-responsible for fighting infections and
preventing growth of cancer
-have a nucleus and mitochondria
-fluid that the blood cells travel in
-90% water, dissolved salts and other
transported substances
Center of the circulatory system
pumps blood through arteries to the rest of
the body.
-At a cellular level gas
moves
in and out of the cell
through the cell membrane
via diffusion.
-Carbon and Oxygen are
small enough to move
through the membrane.
-Hemoglobin is a protein found in red blood cells
-The protein contains positively-charged iron (Fe2+)
molecules which can reversibly bind to oxygen molecules,
found in the lungs, and transport them to various areas of
the body.
-As the hemoglobin attached with oxygen moves into the
capillaries from the arteries, the hemoglobin releases the O2. Then
the O2 diffuses into the tissue and cells. This is because the wall
all of the capillaries are thin for the oxygen, a gas, to diffuse
through.
-As oxygen diffuses out of the
capillaries, CO2 diffuses in and binds
with water or Hemoglobin. Then it
is transported from the capillaries to
the veins to the lungs to be
expelled.
-Unlike Arteries and Veins, Capillaries are
very thin, only one epithelial cell thick,
which allows the O2 and CO2 to move
through the walls
•
•
"Circulatory System - Animation." YouTube. YouTube, 19 May 2012. Web. 30 Oct. 2013.
"The Circulatory System Transports Materials throughout the Body." Biology:Exploring
Life.Boston:Pearson,2006. 654-64. Print.
•
Hua, Tam. "Hemoglobin." Molecular Biology: Davidson College. Ed. Davidson
College. Davidson College, 2010. Web. 3 Nov. 2013.
<http://www.bio.davidson.edu/courses/molbio/molstudents/spring2010/hua/
Hemoglobin.html>.
•
Starr, Cecie, and Ralph Taggart. Biology the Unity and Diversity of Life. N.p.:
Thomson Learning, 2001. Print.
•
The Franklin Institute. "Blood Vessels: Capillaries: Connecting Arteries and Veins." The Human Heart. Ed.
Institute. Franklin Institute, 2001. Web. 3 Nov. 2013. <http://www.fi.edu/learn/heart/vessels/capillaries.html>.
Franklin