Page 52 - Science Course 2 (Book 1)

Mo2-L3c: How Does the Body Protect Itself From Harmful Invaders?

Mo2-L3c How Does the Body Protect Let’s Begin
Itself From Harmful Invaders?
KEY CONCEPTS: Circulation
1. How does the body defend itself from harmful
invaders? The liquid part of blood is called plasma and
contains nutrients, water, and CO 2

Vocabulary A-Z

Let us learn some vocabulary

Lymphocyte
a type of white blood cell that is made in the
thymus, the spleen, and bone marrow.

Blood also contains red blood cells, which carry
oxygen, and platelets, which help the body heal when
a vessel is cut.
Immunity White blood cells help the body defend itself from
the resistance to specific pathogens, or disease- toxins and diseases.
causing agents.
Different people have different proteins on the
surfaces of their red blood cells which scientists
classify into groups called blood types.

Human Blood Type
Blood Type Type A Type B Type C Type O
eosinophil neurophil A B B
A A B B A A
Antigens on
red blood cells A A B B B B
A B A

Percentage of
US population
with this type 42 10 4 44
blood type
Clumping Anti-B
proteins in Anti-B Anti-A None Anti-A
plasma
Blood type(s) A or B
that can be A or O B or O or AB O only
RECEIVED in a or O
transfusion
This blood
type can A or A or B
DONATE TO AB B or AB AB only or AB
these blood or O
types
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