MSC PES 1A 1 Physical Education Studies 1A Circulatory System.
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MSC PES 1A MSC PES 1A 1 Physical Education Physical Education Studies 1A Studies 1A Circulatory System Circulatory System
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Transcript of MSC PES 1A 1 Physical Education Studies 1A Circulatory System.
MSC PES 1AMSC PES 1A 11
Physical Education Studies 1APhysical Education Studies 1A
Circulatory SystemCirculatory System
MSC PES 1AMSC PES 1A 22
IntroductionIntroductionWhat is the Circulatory What is the Circulatory
System?System?
Think of it as a series of Think of it as a series of highways and roads in highways and roads in which nutrients and Owhich nutrients and O2 2
as well as COas well as CO2 2 and and waste around our waste around our bodies.bodies.
Clickview Circulatory SysClickview Circulatory Systemtem
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The BloodThe BloodBlood is the fluid Blood is the fluid
transported by the transported by the circulatory system circulatory system to every cell of the to every cell of the body. It serves the body. It serves the following functions:following functions:
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The BloodThe Blood
Transport of nutrientsTransport of nutrients
Regulation of the body’s fluid contentRegulation of the body’s fluid content
Regulation of the body’s temperatureRegulation of the body’s temperature
Protection of the bodyProtection of the body
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Major Components of BloodMajor Components of BloodPlasmaPlasma: is the : is the watery part of the watery part of the blood in which other blood in which other cells and substances cells and substances are suspended. It are suspended. It containscontains
1.1. WaterWater
2.2. NutrientsNutrients
3.3. HormonesHormones
4.4. Waste ProductsWaste Products
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Major Components of BloodMajor Components of BloodRed Blood CellsRed Blood Cells: give : give blood its red colour. blood its red colour. Make up the majority Make up the majority of blood cells. of blood cells.
RBC’s carry oxygen to RBC’s carry oxygen to our cells.our cells.
Millions of RBC’s are Millions of RBC’s are produced in the bone produced in the bone marrow each minute marrow each minute and last up to 4 and last up to 4 months.months.
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Major Components of BloodMajor Components of BloodWhite Blood CellsWhite Blood Cells: are : are larger than RBC’s and larger than RBC’s and fewer in numbers. Are fewer in numbers. Are produced in the bone produced in the bone marrow & lymph nodes.marrow & lymph nodes.
WBC move to sites of WBC move to sites of infection, where they infection, where they destroy bacteria & destroy bacteria & disease causing disease causing organisms by eating organisms by eating them! them!
Life span of only a few days.Life span of only a few days.
For those that don’t know For those that don’t know who this is…its PACMAN!!!who this is…its PACMAN!!!
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Major Components of BloodMajor Components of BloodPlateletsPlatelets: tiny : tiny fragments of other fragments of other cells produced in cells produced in the bone marrow.the bone marrow.
Are responsible for Are responsible for clotting blood.clotting blood.
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Blood VesselsBlood Vessels
Carry blood from the heart, distribute Carry blood from the heart, distribute it through the body and return it to it through the body and return it to the heart. the heart.
Also called the vascular system.Also called the vascular system.
There are 3 types of blood vessels:There are 3 types of blood vessels:
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Arteries Arteries Carry blood Carry blood AWAYAWAY from the heart.from the heart.
Pushed through by Pushed through by surges of pressure surges of pressure caused by the beating caused by the beating of the heart.of the heart.
Have thick elastic Have thick elastic walls composed of walls composed of smooth muscle.smooth muscle.
Elastic Fibres
Muscle Fibres
Thick Wall
No Valves
Small Lumen
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ArteriesArteries3 Arteries leave the heart:3 Arteries leave the heart: AortaAorta: largest artery in : largest artery in
the body which the body which oxygenated blood flows oxygenated blood flows to the body.to the body.
Pulmonary ArteriesPulmonary Arteries: : carry deoxygenated carry deoxygenated blood from the heart to blood from the heart to each lung.each lung.
Main arteries branch into Main arteries branch into smaller arteries called smaller arteries called arteriolesarterioles. These then . These then turn into turn into capillariescapillaries..
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CapillariesCapillariesMore than 100,000 km of More than 100,000 km of
capillaries in the body!capillaries in the body!
Very thin walls for Very thin walls for diffusion.diffusion.
Only part of circulatory Only part of circulatory system where oxygen, system where oxygen, nutrients and waste nutrients and waste products can be passed products can be passed in & out.in & out.
Eventually capillaries Eventually capillaries form venules which in form venules which in turn form into veins.turn form into veins.
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VeinsVeinsCarry blood Carry blood TOTO the the heart.heart.
Walls are thinner Walls are thinner and less elastic.and less elastic.
Large LumenLarge Lumen
Have ValvesHave Valves
Elastic Fibres
Muscle Fibres
Thinner Wall
Valves
Large Lumen
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Veins - ValvesVeins - ValvesBecause pressure is Because pressure is
lower in veins, lower in veins, blood needs help blood needs help getting back to getting back to the heart.the heart.
1.1. Contraction of Contraction of skeletal muscles.skeletal muscles.
2.2. Valves to prevent Valves to prevent back flow.back flow.
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VeinsVeins4 veins enter the heart. 4 veins enter the heart.
Two returning Two returning deoxygenated blood deoxygenated blood from the body called from the body called the the superior vena superior vena cavacava & & inferior vena inferior vena cavacava and two bringing and two bringing oxygenated blood oxygenated blood from the lungs called from the lungs called pulmonary veinspulmonary veins..
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The HeartThe HeartThe Heart is a The Heart is a
muscular pump muscular pump which contracts which contracts rhythmically and rhythmically and continuously to continuously to drive blood around drive blood around the body through the body through the blood vessels.the blood vessels. Not what a real heart Not what a real heart
looks like!looks like!
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The HeartThe HeartThe Heart has 4 The Heart has 4
Chambers:Chambers:
1.1. AtriaAtria: 2 Upper : 2 Upper Chambers which Chambers which receive blood.receive blood.
2.2. VentriclesVentricles: 2 : 2 Lower Chambers Lower Chambers which pump out which pump out the blood.the blood.
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The HeartThe HeartLeft and right side are Left and right side are separated by a wall separated by a wall called the called the septum.septum. The blood on the 2 The blood on the 2 sides sides DOES NOT DOES NOT MIX!.MIX!.Right side has Right side has deoxygenated blooddeoxygenated blood..Left side has Left side has oxygenated bloodoxygenated blood..Valves are found Valves are found between atria & between atria & ventricles to stop back ventricles to stop back flow of blood.flow of blood.
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The HeartThe HeartDrag & Drop Heart Drag & Drop Heart QuizQuiz
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Heart DissectionHeart Dissection
