Biology Grade 9 unit 3 part thirteen

119 Aufrufe

  • Danke für die Bewertung! Teile es mit Deinen Freunden!

    Danke für Deine Bewertung!

admin
Published
blood is the transport medium in circulatory system
blood is a complex mixture of cells and liquid
It consists of
plasma-a liquid
red blood cells(RBCs)
white blood cells(WBCs) and
platelets.
They are much bigger than the red cells
are fewer in number than RBCs
They have a nucleus
form part of the body’s defence system against microbes.
WBCs can be two types
the lymphocytes
form antibodies against microbes whilst others
the phagocytes
engulf invading bacteria.
Kategorien
Autos
Kommentare deaktiviert.

Als nächstes

Яндекс.Метрика Top.Mail.Ru