Download The Circulatory System Period 1

The Circulatory System
Period 1
By Jessica T., Mitchel W., Beth M.
Overview
● Main Function/Organs
● Maintaining homeostasis
● Working with other systems
● Components of blood
● Blood pressure
● Diseases/disorders
Main function/Organs
Main Organs are heart, lungs, and arteries
The heart has four chambers two atriums and two ventricles
The system is responsible for the flow of blood, nutrients, oxygen and other
gases, and as well as hormones to and from the cells
There are four chambers in the heart
The tiny blood vessels will absorb carbon dioxide which then is replaced
with oxygen, oxygenated blood flows back to the heart through the
pulmonary vein
Maintaining Homeostasis
● During exercise, heart beat must increase to meet the cell's needs
● Cells need to receive oxygen and dispose carbon dioxide at a fast rate
● Blood delivers nutrients and disposes of waste products
● Without oxygen carried to cells, energy could not be made
● All components of blood contribute to maintaining homeostasis
Components of the Blood
Red Cells
● Similar to prokaryotic cells
● 40-50% of blood volume
● Made of hemoglobin
● Transport oxygen from lungs to all
living tissue
● Carry away carbon dioxide
● Anemic people have deficiency in red
Components of the Blood
White Cells
● 1% of blood volume
● Also found in liver, spleen, and lymph
glands
● Produced in bone marrow
● Some seek out and bind to alien protein
● Others surround and destroy alien cells
● Many sub-types have different immune
Components of the Blood
Platelets
● Work with blood clotting chemicals at
wounds
● Adhere to blood vessel walls and plug
rupture in vascular wall
● Peak of activation in the morning
● Release proteins that kill bacteria and
microorganism so
● Produced in bone marrow
Components of the Blood
Plasma
● Clear, yellowish water with sugar, fat, protein
and salt
● 55% blood volume
● Caries red cells, white cells, and platelets
throughout body
● Nourishes the cells and removes waste
products
Blood Pressure
Definition : the strength of the blood pushing against sides of vessels while
spreading around body
Risk: high blood pressure puts pressure on arteries and could lead to strokes
or heart attacks
Measuring: to know if you have high blood pressure, you must have it
measured
Systolic: highest level blood pressure reaches
Diastolic: lowest level blood pressure reaches
Stay healthy to have low blood pressure!
Interactions with Respiratory System
● The respiratory system provides
the oxygen
● The circulatory system circulates
the oxygen to the heart and cells
Interactions with Digestive System
● Circulatory system needs digestive
system to break down the nutrients the
circulatory system distributes
● Digestive system needs the circulatory
system to distribute the blood and
nutrients needed for the organs to
function
Arteries
Carry blood from the heart
Three Layers:
● Endothelium
○ On the inside and provides smooth lining
for blood to flow over
● Media
○ Middle part of the artery
○ Made up of a layer of muscle and elastic
tissue
Veins
● Carry blood back to the heart
● Same three layers as arteries
○ Thinner and less flexible
○ Less muscle than arteries
Diseases/Disorders
Main disease to the circulatory system is when the heart fails for multiple
reasons:
● Aortic aneurysm
○ When an aorta is damaged and can tear, leading to internal bleeding
● Hypertension (high blood pressure)
○ Can cause a heart attack
● Arteriosclerosis
○ When the fatty deposits in the arteries build up and can cause a heart attack or stroke
Bibliography
"Heart and Circulatory System." Heart and Circulatory System. N.p., 2016. Web. 13 June 2016.
Nowicki, Stephen. Biology. Orlando: Houghton Mifflin Harcourt, 2012. Print.
O'Neil, Dennis. "Human Blood: Blood Components." Human Blood: Blood Components. N.p., 2013. Web. 13 June 2016.
W., Arianna. "How The Circulatory System Works With The Digestive System." Prezi.com. N.p., 21 Nov. 2013. Web. 13 June
2016.
Zimmermann, Kim Ann. "Circulatory System: Facts, Function & Diseases." LiveScience. TechMedia Network, 11 Mar. 2016.
Web. 13 June 2016.