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Blood

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by

Emily Kirby-Jones

on 6 September 2018

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Transcript of Blood

62
ECG
bpm
Thank You!
What is in it?
1. Plasma
Plasma
Mostly water, with things dissolved in it:
Hemoglobin
This is within the red blood cells and it:
White Blood Cells
Defend the body against diease
Kill bacteria using phagocytes and antibodies
Roles of the Blood
Two jobs:
Blood
2. Red Blood Cells
3. White Blood Cells
4. Platelets
Glucose and nutrients
Hormones
It carries everything else in it.
Red Blood Cells
Carry Oxygen via the
hemoglobin
• combines with oxygen and carries it to muscle cells
• picks up carbon dioxide and expires it as cellular waste
• transports carbon dioxide from tissues back to lungs
• regulates iron levels

Made in bone marrow
Made in bone marrow, lymph nodes and spleen.
Platelets
Stick to each other
Form blood clots (scabs)
Stop you from loosing blood
Stops germs getting in
1. Carries things
2. Protecting against infections
Carries:
Oxygen
from the lungs to the cells
Carbon Dioxide
from cells to lungs
Waste
e.g. water to kidneys
Glucose
and other nutrient from gut to cells
White blood cells
to infected places
Heat
to skin to be removed
Blood Vessels
A
rteries
Blood travels under high pressure
Musclar
Elastic fibres and muscle cope with high blood pressure
Carry blood
away
from the heart
(oxygenated)
Do not have valves
Small Lumen
Ve
in
s
Blood flows more slowly, low pressure.
Veins have
v
alves to stop blood flowing backwards
Take blood
back in
to the heart
(deoxygenated)
Thin walls and large lumen.
Capillaries
Blood travels under very low pressure
Walls are one cell thick for easy diffusion of O2 and Food into cells and CO2 and waste back
Carry blood to all the cells in the body
Heart Measurements
Heart Rate- The number of times your heart beats per minute.
Resting HR= 70bpm (althetes as low as 40bmp)
Max HR= 220-Age
Stoke Volume (ml)- the volume of blood pumped out of the heart during one contraction
Cardiac Output- Amount of blood ejected from the heart in one minute.
Cardiac Output (CO) = Stroke Volume (SV) x Heart Rate (HR)
Temperature Control
One of the functions of blood it to carry heat to where it is needed.
Too Hot:
Blood vessels under the skin widen / vasodilate
Blood moves heat to extremities to protect the core temperature
Sweating occurs
Body hair flattens


Too Cold:
Blood vessels under the skin contract / vasoconstrict
Blood moves heat to the core
Body hairs lift to trap air
Body starts to shiver to produce heat
Blood Related Illnesses
Haemophilia- blood cannot clot.
Anaemia- Decrease in RBCs/ Haemoglobin
High Blood Pressure- Blood can't move efficiently
Leukemia- blood cancer
Effects of Performance?
Contact sport- Bruising
Feeling tired and feint
Can't exercise for long periods
Treatment may mean you can't train
Altitude Training
Adaptations
Increased production on RBCs and haemoglobin concentration does too.
Volume of blood increase
More capillaries form around the alveoli
What type of athlete good for:
endurance athletes
long distance
Process:
1. Athlete goes to altitude where there is a lack of oxygen
2. Same amount of oxygen needed by the body to train, therefore body has to adapt.
3. Once the body has adapted, they go back to sea level (more O2) and they can take it lots more oxygen
Oxygenated blood
Deoxygenated blood
-Oxygen
-Nutrients
-Carbon Dioxide
-Waste
-Oxyhaemoglobin
Artery- Capillary- Vein
Aorta- Artery
Vena Cava- Vein
Pulmonary- Lungs
Colour each section to indicate oxygenated or deoxygenated blood. Draw arrows to indicate blood flow.
Double Circulatory System
Pulmonary Circuit- Right- Lungs
Systemic circuit- Left - Body
1. Atria Contract
2. Ventricles Contract
3. Out of the arteries
4. In through the veins
Blood passes through the heart twices in each circuit.
120 ml x 70 bmp = 18 litres/minute
Tasks
Page 55. Task 1- Find out your resting heart rate.
Page 56- Task 2- How fast can your heart arte recover to resting after exercise?
What does having a low RHR tell us about our cardiovacular fitness?
What does the speed of recover tell us about our cardiovascular fitness?
Page 57- Task 3- Calculating cardiac output.
Effect of exercise
In order to improve our CV fitnes we should work at 55-85% of our Max HR.
What happen to the following after lots of exercise?
Resting HR
Recovery time
Stroke volume
Full transcript