Question

Blood Vessels and the Circulatory System

Overview of Circulatory System

Blood vessels form closed tubular systems which carry blood from the heart through the systemic and pulmonary systems. Arteries carry blood away from the heart to smaller arterioles, which feed capillary beds. The capillary beds empty into venules, which coalesce into larger veins. All veins eventually empty into the superior and inferior venae cavae or into the pulmonary veins. These vessels return blood to the heart.

A. List the heart chambers and the major pathways that blood flows through in its circuit through the heart and the pulmonary and systemic systems. Where appropriate, list the names of the major blood vessels.

B. Structure of artery and vein.

1.    The walls contain three distinct structures. The innermost layer is the tunica intima, which consists of a layer of (   ) (   ) epithelium. It lies upon a thin layer of connective tissue containing (   ) and (   ) fibers. Surrounding the tunica intima is the tunica (   ). It is the thickest of the three layers, and contains primarily (   ) (   ) and (   ) muscle. The outermost layer is the tunica adventitia or (   ). It contains primarily (   ) and (   ) fibers, which connect the vessel to the surrounding tissues. Label the artery, connective tissue, tunica adventitia, tunica intima, tunica media, valve, vein.

Answer 1

SONO7 FOUR PULMONuARy VE iNS FROM PULImoNARY ARTERY OR rey LUNUS CARRYING OXY4ENATEDB LOOS To THE HEART TRUNE FROM HEART (ARKVING DEOXYUENATED BLOOD TO THE LUNUS HEART AORTA CARRYING CXY4ENATED VENA CAVA CARPYING DeoxyuENATED BLOOD FROM HEART TO ALL PARTS Of THG BLOOD FROM ALL PARTS OF JHЕ Boрy Tо Возy. HEART ARE RED heaue 0ujgum- Ju chv ed when it brugis SYSTEMIC ARTERIGS Theant Lianes heufou apprars durestīt SYSTEMIE VEINS ARE ulu uack lo Meab, ib has mtl leas OuygKun and redd BLUG causi whon ulood it Cleapor , doku red reu appea le ltlause lee Lugut

OXY4ENATED BLwOD DeoxyuGNATED BlooD BoDY LUNGS ALL PARTS OF PULMONARY VENA CAVA VEINS iunT ATRIU LEFT ATRIUm RIGHT VENTRICLE LEFT VENTRICLE PULMONARY ARTER) AofTA Al PARTS LUNGS OF Aleu Carsy O2 liood to al pasti body ercep pulnmonay avt Vei ay Coz lood Jom ali parts t veüm. no erept putmenau
the heart chambers are the atrium and ventricle for the left and right side of the heart.

The pulmonary circulation for system is for the lungs where as the systemic circulation is seen throughout the body.

The structure of artery and vein

The innermost layer is tunica intima which consists of SIMPLE SQUAMOUS EPITHELIUM.

It lies upon a thin layer of connective tissue containing BASEMENT MEMBRANE and ELASTIC fibres.

Surrounding the tunica intima is the tunica MEDIA.

Which is the thickest of the three layers because it contains primarily ELASTIC, INVOLUNTARY, SMOOTH MUSCLE

The outermost layer is the tunica adventitia or TUNICA EXTERNA.

It contains primarily CONNECTIVE TISSUE and ELASTIC and COLLAGEN fibres.

TUNICA EXTERNA (CONNECTIVE TISSUE TUNICA MEDIA (CIRCULAR MUSCLE FIBRES AND ELASTIC TISSUE) -ELASTIC MEMBRANE ENDOTHELIUM -LUMEN- A

A is structure of ARTERY and

B is structure of VEIN

The structures for both arteries and veins is same just the lumen in arteries is narrow because blood flows at high pressure whereas veins have a broad lumen.

Arteries have a thick muscular wall that is the tunica media.