Circulatory system
CHIZOBA EZENWA
What is the primary
function of the
circulatory system?

The cardiovascular
system consists of the
heart, blood vessels,
and blood. This system
has three main
functions: Transport of
nutrients, oxygen, and
hormones to cells
throughout
the body and removal
of metabolic wastes.
What is the primary
function of blood?

Blood has three main
functions: transport, protectio
n and regulation. Blood
transports the following
substances: Gases, namely
oxygen (O2) and carbon
dioxide (CO2), between
the lungs and rest of
the body. Nutrients from the
digestive tract and storage
sites to the rest of the body.
What organs makes up
the circulatory system?

The circulatory system
consists of :
the heart(cardiovascul
ar), blood , and blood
vessels.
Describe the structure of
the heart?

A. In how many parts is the heart divided?

The heart is divided into four chambers.

B. what is the upper half called?

The two upper chambers are called the atria. The right atrium and
left atrium are separated by a wall of tissue called the atrial
septum.

C. what is the lower half called?

The two lower chambers are called the ventricles, and are
separated into the right and left ventricle by the ventricular
septum

D. what are the major blood vessels connected to heart?

Five great vessels enter and leave the heart: the superior and
inferior vena cava, the pulmonary artery, the pulmonary vein, and
the aorta. The superior vena cava and inferior vena cava
are veins that return deoxygenated blood from circulation in the
body and empty it into the right atrium.

Heart pumps blood carrying materials to different cells.
Blood travels through tube like structure called blood
vessels.

Circulation takes place in two pathways:
1.
Pulmonary Circulation
1.
2.
Carries blood to lungs and back to the heart.
Systemic Circulation
1.
Carries blood to body and back to the heart.
In what way the heart
facilitates the
circulation?
There Are Two Types
of Circulation:
Pulmonary Circulation and
Systemic Circulation.

Pulmonary circulation moves
blood between
the heart and the lungs. It
transports deoxygenated
(blood without oxygen)
blood to the lungs to absorb
oxygen and release carbon
dioxide out of body.
IN WHAT WAY THE HEART FACILITATES
THE CIRCULATION OF BLOOD?
 Systemic
circulation: is the portion of the
cardiovascular system which transports
oxygenated blood away from the heart
through the aorta from the left ventricle
where the blood has been previously
deposited from pulmonary circulation, to the
rest of the body, and returns oxygendepleted blood back to the heart.
Your Blood Vessels:
Pathway of Circulation

3 types of vessels
 Arteries
 Capillaries
 Veins
Arteries:
carries blood Away from heart to
cells

Large

Thick-walled, Muscular

Elastic

Carries Oxygenated blood

Carried under great pressure

Steady pulsating
Capillaries

Smallest vessel

Microscopic

Walls one cell thick

Nutrients and gases diffuse through these vessels in to
blood.

Again capillaries pass the waste/carbon dioxide to veins.
Veins:
Carries blood back to heart



Carries blood that contains
waste and CO2
Blood not under much pressure
Valves to prevent much gravity
pull
Explain the connection
between respiratory system
and circulatory system?

The circulatory and respi
ratory systems work
together to circulate
blood and oxygen
throughout the body. Air
moves in and out of the
lungs through the
trachea, bronchi, and
bronchioles. Blood
moves in and out of the
lungs through the
pulmonary arteries and
veins that connect
to the heart.