Circulatory system

On average, your body has about 5 liters of blood continually traveling through it by way of the circulatory system. The heart, the lungs, and the blood vessels work together to form the circle part of the circulatory system. The pumping of the heart forces the blood on its journey.

The body’s circulatory system really has three distinct parts: pulmonary circulation, coronary circulation, and systemic circulation. Or, the lungs (pulmonary), the heart (coronary), and the rest of the system (systemic). Each part must be working independently in order for them to all work together.

Luke D Bell

heart by harry campbell

the liquid part of the blood is called plasma

there are between 5 and 6 litres of blood in the body

White Cells

there are several different kinds of white blood cells. most are larger then the red blood cells and they all have a nucleus .there is 1 white cell to every 600 red cells .many of them under go a process of maturation and devoling

Whenever a germ or infection enters the body, the white blood cells snap to attention and race toward the scene of the crime. The white blood cells are continually on the lookout for signs of disease. When a germ does appear, the white blood cells have a variety of ways by which they can attack. Some will produce protective antibodies that will overpower the germ. Others will surround and devour the bacteria.

The white blood cells have a rather short life cycle, living from a few days to a few weeks. A drop of blood can contain anywhere from 7,000 to 25,000 white blood cells at a time. If an invading infection fights back and persists, that number will significantly increase.

A consistently high number of white blood cells is a symptom of Leukemia, a cancer of the blood. A Leukemia patient may have as many as 50,000 white blood cells in a single drop of blood.

White cells

There are several diffrent kinds of white cells. Most are larger than the red cells, and they all have a nucleus. There is 1 white cell to every 600 red cells and they are made in the same bone marrow that makes red cells. Many of them undergo a process of maturation and development in the thymus gland, lymph nodes or spleen the two most numerous types of white cells are phagocytes and lymphcytes.   

Whenever a germ or infection enters the body, the white blood cells snap to attention and race toward the scene of the crime. The white blood cells are continually on the lookout for signs of disease. When a germ does appear, the white blood cells have a variety of ways by which they can attack. Some will produce protective antibodies that will overpower the germ. Others will surround and devour the bacteria.

 The white blood cells have a rather short life cycle, living from a few days to a few weeks. A drop of blood can contain anywhere from 7,000 to 25,000 white blood cells at a time. If an invading infection fights back and persists, that number will significantly increase.

A consistently high number of white blood cells is a symptom of Leukemia, a cancer of the blood. A Leukemia patient may have as many as 50,000 white blood cells in a single drop of blood.

blood

1. Carbon dioxide is dissolved in the watery party of the blood called the plasma.
2. Blood moves through the capillaries very quickly so a large amount of oxygen and carbon dioxide can be exchanged in a short time.
3. Pink blood is oxygenised
4. dark blood is de-oxygenised

 

The blood.

• 45% of a drop af blood is made from cells.
• The blood is made up of red and white blood cells.
• The red cells cantain haemoglobin whitch transports oxygen from the lungs.
• There are 500 red blood cells for every white cell.
• The white cells fight disease.
• Photocyte,lymphocyte.
• Arteries-Take blood away from the heart.
• Veins-Brings blood to the heart.
• red blood cells have no nucleus and can carry more oxygen.

Jonathan Thompson

PLASMA by Adam Morrow

The liquid part of the blood is called Plasma. It is water with a large, amount of substancea dissolved in it. The ions of Sodium, Potasium, Calcium, Chloride and Hydrogen Carbonate, for example Protiens such as Fibrinogen , Aluminum and Globulin Constitue an importiant part of the Plasma. Fibrinogen is needed for clotting.

The Circulatory System

The Circulatory system transports materials around the body in a liquid called the blood, Blood is moved along tubes called blood vessels by the pumping action of the heart.

Red Cells, There are tiny, disc like cells which do not have nuclei. They are made of spongy cytoplasm enclosed in an elastic cell membrane. In their cytoplasm is the red pigment, haemoglobin a protein combined with iron.Haemoglobin combines with oxygen in places were there is a high concentration of oxygen to form oxyhaemoglobin. Only haemoglobin is an unstable compound. It breaks down and releases its oxygen in places where the oxygen concentration is low.

The Heart – Structure and Function

The hearts function is to pump blood around the body. The blood going around the body needs to have oxygen in it to keep us alive this blood gets its oxygen from the avioli in our lungs, then it is pumped to the left side of our where it is then pumped around our body. The blood that has been piumped around our body has no oxygen in it now so it goes into the right side of our heart, it then goes from the right side of our heart to the lungs where it is oxygenated agin and this process keeps happening.

Facts

>The heart is the size of your fist.

>Each side of the heart has two chambers.

>The heart has a thick wall down the middle of it.

 

blood

As we all know , our blood consists of red blood cell, white blood cell and plasma, that is something like a liquid.

Red blood cells

It looks like a disc and consists of 95% of all the blood. All red blood cells eventually wear out and is broken down.

If a red blood cell has a high concentration of oxygen, it is called oxygenated blood and it is called deoxygenated blood if it has less oxygen.

White blood cells

there are a few kinds of white blood cells. The most common one is called phagocyte and lymphocyte. They engulf bacteria and produce antibiotics.

Plasma