Blood (krev) – prezentace (Aj)

Téma prezentace: Blood (krev)

Typ souboru: prezentace PPT

Přidal(a): Kateřina Wojnarová

 

 

Popis materiálu:

Prezentace je vhodná do anglického jazyka. Obsahuje základní fakta o krvi, její typy, vlastnosti…

 

Osnova:

Blood

Kateřina Wojnarová

Basic facts

Amount: men – 5,6 l, women – 4,5 l

 

Functions:

1)Transport

  • Dissolved gases (CO2, O2)
  • Waste products of metabolism (e.g. water, urea)
  • Hormones, nutrients (minerals, vitamins)
  • Blood cells
  • Heat

 

2)Resistence

  • Antibodies to fight the infection

Composition

žSuspension of blood cells in blood plasma

žBlood plasma

¢Transparent yellowish liquid – 90% H20, 8% org.s.

¢Proteins – albumins, globulins, fibrinogen,…

¢Glucose

¢Fats

¢Hormones, vitamins

žBlood cells

¢Red blood cells – erythrocytes

¢White blood cells – leukocytes

¢Platelets – thrombocytes

Red blood cells

Biconcave discs without nucleus

Contain haemoglobin (Fe2+) – carries oxygen

Live 120 days

Made in bone marrow

5 millions in one drop

Deficiency – Anemia

White blood cells

Nucleus, different shapes

Ward off infection

4 000 – 10 000 in one drop

Service life: hours, days, the whole life

Use phagocytosis

Many types

Leukemia – high number
of leukocytes

Phagocytosis

Platelets

Help blood to clot

Irregularly-shaped, colourless bodies

200 000 – 300 000 in one drop

Fragments from one big cell -megakaryocyte

Blood coagulation

Blood is exposed to air – clot begins

Platelets change protein fibrinogen (non-active)
to fibrin (active)

A web-like mesh → catching erythrocytes

A clot / scab

Calcium, vitamine K

Hemophilia

Blood types

Four types: A, B, AB, O

Discovered: Landsteiner, Jánský

Antigens (surface of erythrocytes) and antibodies (plasma)

Depends on genes inhereted from your parents

Blood type 0 – universal donor

Blood type AB – universal receiver

Antoher factor – Rh factor (+/-)

Blood types

Heart beat sound

Normal heart beat

Mitral regurgitation

White blood cell chases bacteria

Resources

www.texasheartinstitute.org/HIC/Anatomy/blood.cfm

www.fi.edu/learn/heart/blood/blood.html

www.en.wikipedia.org/wiki/Blood

Thank you for your attention