Blood flows through the circulatory system, carrying oxygen and nutrients to cells and waste products away. It is composed of blood plasma and blood cells produced in the bone marrow. Blood vessels include arteries, which carry blood away from the heart, capillaries that branch throughout tissues, and veins that return blood to the heart. The heart pumps blood through two circuits: pulmonary circulation to the lungs for gas exchange, then systemic circulation throughout the body.
circulatory system, their parts, three kinds of circulation, heart, how does it works, artery, vein, capillary, what is in blood, RBC, function summary
TRANSFER OF BLOOD THROUGH THE CIRCULATORY SYSTEM THAT IS DOUBLE CIRCULATION OF BLOOD IN OUR HEART. HEART HAS THE JOB OF PUMPINGTHESE THINGS AROUND THE BODY. THE HEART AND BLOOD VESSELS MAKES UP THE CIRCULATORY SYSTEM. THE PPT INCLUDES THE FUNCTION OF VEIN CAPILLARIES AND ARTERY
circulatory system, their parts, three kinds of circulation, heart, how does it works, artery, vein, capillary, what is in blood, RBC, function summary
TRANSFER OF BLOOD THROUGH THE CIRCULATORY SYSTEM THAT IS DOUBLE CIRCULATION OF BLOOD IN OUR HEART. HEART HAS THE JOB OF PUMPINGTHESE THINGS AROUND THE BODY. THE HEART AND BLOOD VESSELS MAKES UP THE CIRCULATORY SYSTEM. THE PPT INCLUDES THE FUNCTION OF VEIN CAPILLARIES AND ARTERY
Biology Project [Circulatory System] Vijay Raja Std Vii Navdeep With Soundvijayaswathy
My project was to prepare a presentation on human circulatory system.
This is what it finally looked like .
Hope it comes of some use to you all .
Vijay Raja
2. Blood: the fluid of life
In multicellular organisms the medium is called
axtracellular fluid. It contains interstitial fluid, a
liquid found in the spaces between cells.
Blood is a viscuos fluid with a salty taste which flows
inside the vessels of the circulatory system.
3. Composition of blood
Blood is made up of blood cells suspended in a liquid
called blood plasma;
Blood plasma: it’s a substance made up of water
containig dissolved molecues like minerals, nutrients,
waste products, proteins and hormones.
5. Functions of blood
Transports nutrients and oxygen to all cells
Collects waste products released during cell metabolism.
Transports hormones around the body
Helps to regulate temperature
Protects the body from infections
The body uses a lot of mechanisms to prevent blood loss
when a blood vessel is broken
The membranes of red blood cells contain proteins that are
responsible for differences in the blood type of different
people
6. Blood vessels
Blood flows around the body in three types of blood
vessel:
Arteries: They carry the blood away from the heart.
Capillaries: Are blood vessels which branch out from
the arterioles and are found in every body tissue
Veins: Take the blood back to the heart and are
formed by capillaries grouped together.
7. Heart
Hollow organ made of
thick muscle tissue
(myocardium) that
pumps the blood to
make it move around
the circulatory system
with the function of
supply to the cells
nutrients and oxygen.
http://videos.howstuffw
orks.com/health/heart-
videos-playlist.htm
8. Heart’s activity
Heart collects blood
from the veins, pumps it
out into the arteries. The
pumping movement
(heartbeat) occurs
continuously and pushes
blood:
10. Circulation through the blood vessels
Ventricular systole pumps the bood to the major arteries,
(elastic).
So they can:
- Dilate when they receive blood, lowering blood pressure.
- Contract back to the normal diameter, pushing the blood
forwards.
11. Then it travells to the smaller vessels and the
capillaries.
- The blood pressure is higher during syshole
than turning diastole, so blood pressure alternates
between maximun and minimun. When blood
reaches the capillaries (flows slowly) pressure is
lower and facilities the exchanges.
- The blood flows to the venules and veins and
returns to the heart.
12. A double circuit
Pulmonary circulation
The circuit of the blood has two parts:
- Pulmonary circulation: blood starts in the right
ventricle and splits into arteries which each lead
to a lung. The capillaries surrounds the alveoli;
(here gas exchange takes place) they turn into
venules, which join to veins which lead to the left
atrium. The blood flows to the left ventricle,
where systemic circulation begins.
13. Systemic circulation
- Systemic circulation: blood flows along the aorta
and splits into arteries, arterioles and then into
capillaries. These lead to all body (but no to
lungs). Blood provides cell which everything they
need, and takes away waste products. Then
returns to the right ventricle where pulmonary
circulation starts again.