Ch. 5 CVS

What is the CVS made up of

Heart & blood vessels

What are the functions of the CVS

transport, protection & veins

What is the role of the lymphatic system

Assists CVS by collecting excess fluid to blood

What is the fluid called that is excess fluid transported to blood

lymph

How is excess fluid returned to the vascular system

Lymphatic system

What are the main blood vessels

Arteries, veins and capillaries

What is the outer layer of the arterial wall made up of

connective tissue

What is the middle layer of the arterial wall made up of

Smooth muscle & elastic tissue

Small thin blood vessels

Capillaries

Components of the capillary bed

Walls & capillary sphincters

Arteries

Carry blood away from the heart

Arteries carry blood that is

O2 rich

Veins carry

blood away from the heart

Veins carry blood that is

O2 poor

Dilation of arterioles

causes blood pressure to fall

Arterial structure that resists blood pressure

Valves

Valves keep blood flowing..

toward the heart

Capillary function

Exchanges materials with cells of the body

Structure that serves as a blood reservoir

veins

What is the structure of the heart that splits it right down the middle & is a wall

arterial septum

Veins store how much of the blood

70 percent

What is the membrane that surrounds the heart

the pericardium

What are the two upper structures within the heart

atria

What are the two lower structures within the heart

ventricles

Myocardium

interior wall of tissue, recieves oxygen & nutrients from coranary arteries

Blood flow to the heart

superior vena canva, inferior vena cava, O2 poor blood to the right ventricle

Blood flow to & from the heart

Superior & Inferior vena cava, Right atrium, tricuspid valve, right ventricle, pulmonary artery lungs becoming oxygenated, pulmonary veins, left atrium, mitral valve, left ventricle. aorta,

Heart chamber which pumps to the pulmonary circuit

Right ventricle

Structures that anchor the valves

chord tendinae

Role of semi-lunar valves

Allowing blood to be pumped from ventricles into arteries & shutting to prevent back flow

What does the “sub” represent in a heartbeat

Closure of the atrioventricular valves

What produces the “dub” in the heartbeat

Closure of the semilunar valves

Internal conduction of the heart

Electrical signals that coordinate heart contractions

Pacemaker of the heart

SA node

Part of brain that contains cardiac control enter

Medulla oblangata

Cause of an increased heartbeat

stress

Blood pressure that refers to when the heart is filling with blood

Diastolic

Blood pressure that refers to when the heart ia contracting

systolic

High bp

hypertension

low bp

hypotension

Blood pooling below the knees refers to

skeletal muscle pump

Normal BP

120/80

Hypertension stg 1 starts at

140/90

stg 2 hypertension starts at

160/100

Body location w/ highest BP

arteries/aorta

How does how far blood is from the RV effect BP

BP drops steadily when moving away from RV

Largest artery in the systemic circuit

Aorta

Blood vessel with the greatest oxygen level

Pulmonary vein

Blood vessel which carries deoxygenated blood in the pulmonary circuit

Pulmonary artery