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B2-organisation > Circulatory System_blood > Flashcards

Circulatory System_blood Flashcards

1
Q

What do red blood cells carry

A

Oxygen

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2
Q

What is the shape of red blood cells

A

Biconcave disc(doughnut)

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3
Q

Why do red blood cells have a biconcave shape

A

Gives them a large surface area for absorbing oxygen

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4
Q

What do red bloods cells not have and why is this an advantage

A

Nucleus

They can carry more oxygen

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5
Q

What red pigment do red blood cells carry

A

Haemoglobin

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6
Q

What does haemoglobin do in the lungs

A

Binds with oxygen to become oxyhaemoglobin

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7
Q

What does haemoglobin do in body tissues

A

Oxyhaemoglobin splits into haemoglobin and oxygen. And oxygen is released

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8
Q

What do white blood cells fight against

A

Infections

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9
Q

What is phagocytosis

A

Microorganisms are gobbled up

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10
Q

What do other white blood cells do to fight infection

A

Produce antibodies and antitoxins

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11
Q

Do white blood cells have a nucleus

A

Yes

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12
Q

What do platelets help

A

Blood clots

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13
Q

What are platelets

A

Small fragments of cells that have no nucleus

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14
Q

When you get cut what do platelets do

A

Clot the wound to stop blood from pouring out

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15
Q

What can lack of platelets cause

A

Excessive bleeding and bruising

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16
Q

What is plasma

A

Liquid that carries everything in blood

17
Q

name the seven things that plasma carries

A 
Red and white blood cells
Nutrients like glucose and amino acids 
Carbon dioxide 
Urea
Hormones
Proteins
Antibodies and antitoxins-produces by white blood cells
18
Q

EXAM QUESTION

Describe the purpose of platelets in blood

A

To help clot wounds

19
Q

EXAM QUESTIONS

Outline three ways in which red blood cells are adapted to carry oxygen

A

No nucleus more space to carry oxygen
Biconcave shape which gives them a large surface area
Contain haemoglobin which combines with oxygen in the lungs and released to body tissues

B2-organisation (6 decks)

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