Blood - Cells & Vessels Flashcards by Isabella Smyth

Q

What is the composition of blood

A

55% plasma, 45% platelets

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Q

What is blood

A

type of connective tissue

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Q

What are erythrocytes

A

Red blood cells

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Q

What are the characteristics of erythrocytes

A

no nucleus, no DNA

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Q

What are leukocytes

A

white blood cells

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Q

What are leukocytes involved in

A

immune response

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Q

describe erythrocyte shape

A

biconcave

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Q

Why is erythrocyte shape biconcave

A

increase SA - pack haemoglobin

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Q

How are erythrocytes prodcued in adults

A

erythropoiesis

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Q

Where are erythrocytes produced in embyros

A

yolk sac

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Q

Where are erythrocytes produced post natally

A

bone marrow

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Q

what is erythrocyte production controlled by

A

erythropoietin

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Q

where is erythropoietin produced

A

kidney

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Q

what does erythropoietin stimulate

A

erythrocyte production

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Q

What is the effect of erythropoietin

A

increases stickness of blood

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Q

what is erythropoietin

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A

hormone

Q

What are reticulocytes

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A

immature red blood cells

Q

describe the structure of reticulocytes

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A

anucleate, lots of RER

Q

How are leukocytes formed

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A

leukopoesis

Q

what are the main types of leukocyte

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A

agranulocytes, granulocytes

Q

What are the types of agranulocytes

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A

lymphocytes, monocytes

Q

What are the types of granulocytes

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A

neutrophils, eosinophils, basophils

Q

what are granulocytes involved in

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A

intracellular processes

Q

What are the three layers in blood vessles

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A

intima, media, adventitia

what is leukopenia

decreased white blood cells

Describe the pressure in the pulmonary system

low

Describe the pressure in the systemic system

high

What vessel maintains blood pressure

muscular arteries

Which blood vessel layer is large in arteries

media

TRUE or FALSE - capillaries have pores

TRUE

Describe the intima layer

simple, squamous endothelium

Describe the adventitia layer of blood vessels

connective tissue, external elastic layer