What are the characteristics of blood vessels?

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What are the characteristics of blood vessels?
Oct 11th, 2014

Characteristics of Blood Vessels

 


arteries

carry oxygenated blood

arterioles

very small arteries

capillaries

deposit/pick up things from tissues

venules

tiny veins

veins

carry unoxygenated blood

Reversed

in pulmonary arteries

Blood vessel made of

endothelial cells

Artery structure

elastic layer; smooth muscle; connective tissue

smooth muscle

contracts to pump blood

capillaries

single cell layer; embedded in tissues

Capillaries only place

where exchange with tissues takes place

Small plasma components become

interstitial fluid because of high pressure

Lower blood pressure

coming out of capillaries

Leukocytes

granulocytes and agranulocytes

Granulocytes

grainy proteins in cytoplasm

Agranulocytes

No grainy proteins

Types of granulocytes

neutrophils; eosinophils; basophils

Types of Agranulocytes

monocytes; lymphocytes

Neutrophils

first to arrive at infection

Neutrophils ingest

viruses, bacteria, fungi, protozoans

Basophils

promote inflammation

eosinophils

moderate allergic reactions; attack parasitic worms

Monocytes

turn into macrophages/engulf foreign organisms

types of lymphocytes

T-cells; b-cells; natural killer cells

T-cells

attack tumor cells

B-cells

produce antibodies

natural killer cells

defend from virally infected/cancer cells

Platelets

carry growth factors

Growth factors

promote growth of cells/tissues



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