Download Circulatory System

• The human circulatory system consists of
the heart, a series of blood vessels, and
the blood that flows through them.
• The circulatory system helps transport
fluids throughout the body which helps it
obtain oxygen, nutrients and to remove
wastes.
• Distributes and delivers materials around an organism
• Supplies cells with oxygen and nutrients so that they
can perform
• Carries hormones to appropriate destinations in body
• Maintains body temperature
• Protects the body from infection
• Has ability to clot – when tissue is broken – internally
and externally
• There are 3 types of blood vessels
• Arteries
• Veins
• Capillaries
• Blood vessels that carries blood away from the
heart.
• Have thick elastic walls made of connective
tissue and smooth muscle
• Blood vessel that carries blood back to the
heart.
• Veins have one-way valves that keep blood
moving towards the heart
• The flow of blood in veins is also helped by
skeletal muscles.
• Microscopic blood vessel that connects arteries
and veins
• Walls of the capillaries are only one cell thick
• Nutrients and oxygen diffuse into body cells
through the thin capillary walls
• Waste materials and carbon dioxide diffuse
from body cells to the capillaries
• Every minute your heart beats 70 – 80
times
• Every minute your heart pumps 5 liters (
2 ½ bottles of soda) of blood
• The heart is made up of four chambers.
• The two upper chambers are the Atria
(Atrium single), which receive blood.
• The two lower chambers are the
Ventricles, which pump blood out.
Oxygen poor blood comes
from the Vena Cava into the
right side of the heart.
It first flows into the Right
Atrium then into to Right
Ventricle.
The Right Ventricle pumps the
blood to the lungs through the
Pulmonary Artery to get rid of
wastes and to pick up Oxygen.
The newly oxygen-rich blood
returns to the heart through the
Pulmonary Vein and enters the
Left Atrium.
From the Left Atrium it travels
into to Left Ventricle
The Left Ventricle pumps the
oxygen-rich blood to all parts
of the body through the Aorta.
• Pulmonary – circulation of blood
between heart and lungs.
• Systemic – circulation of blood
between heart and all of the
systems of the body.
• Fatty deposits build up on the arterial walls.
• Eating foods high in cholesterol and saturated
fats can cause these deposits to form.
• This can occur in any artery in the body. If it
occurs in a coronary artery it can cause a heart
attack.
• To fix this problem, open heart surgery may be
needed.
• Also known as High Blood Pressure
• Places extra strain on the heart
• The heart must work harder to keep blood
flowing
• Can be caused by Atherosclerosis
• Results when the heart cannot pump blood
efficiently
• Can be caused when heart muscle tissue is
weakened by disease
• Can be caused when heart valves do not work
properly.
• When the heart cannot pump blood, fluids
collect in the arms, legs, and lungs.
• Symptoms = shortness of breath and tired
1. Blood carries oxygen from your lungs to all
your body cells. Carbon dioxide diffuses from
your body cells into your blood. Your blood
carries carbon dioxide to your lungs to be
exhaled.
2. Blood carries waste products from your cells to
your kidneys to be removed
3. Blood transports nutrients and other substances
to your body cells.
4. Cells and molecules in blood fight infections
and help heal wounds
• Blood is made of a mixture of
plasma, cells, and cell fragments
• Plasma is the liquid portion of the blood.
• Plasma makes up more than half of the volume
of blood
• Nutrients, minerals, and oxygen are dissolved in
plasma and carried to cells
• Wastes from cells are also carried in plasma
•Formed in the bone marrow
• Disk shaped cells with no nuclei
• Contain hemoglobin
•Hemoglobin carries oxygen
•Hemoglobin makes your blood red
• Red blood cells survive for about 120
days
• Most numerous of the blood cells
• Fight bacteria, viruses, and other invaders
of your body
• Irregularly shaped cell fragments that
help clot blood.
• Platelets have a life span of 5-9 days