Shared Flashcard Set

Details

Heart and Vessels
15
23
Anatomy
Undergraduate 2
03/15/2008

Additional Anatomy Flashcards

 


 

Cards

Term

What is systolic

Definition
Contraction of a heart chamber
Term
What is diastolic
Definition
Relaxation  phase of a heart chamber
Term
What happens during atrial systole?
Definition
  1. Atrial contract
  2. AV valves open
  3. Semilunar valves closed
Term
What happens in early ventricular Systole?
Definition
  1. atria Relax
  2. Vetnricles Contract
  3. AV Valves forced closed
  4. Semiunar Valves still closed -
  5. Pressure builds
Term
What happens during late ventricular systole?
Definition
  1. Atrai relax
  2. Vetnricles contract
  3. AV valves remain closed
  4. Semilunar valves open b/c of pressure
Term
What happens in early ventricular distole?
Definition
  1. Atrai and ventricles relax
  2. AV valves closed
  3. Semilunar Valves closed
  4. Atria passively filling with blood
Term
Late ventricular diastole
Definition
  1. Atria and Ventricles relax
  2. Atria passively fill with blood
  3. AV valves open
  4. Semilunar valves closed
Term

What are the three classes of vessels

Definition
  1. arteries - blood away from the heart
  2. Caprillaries - gas and nutrient exchange b/t vessels and tissues
  3. Veins - transport blood back to heart
Term

Structure of Vessel walls

(3)

Definition
  1. Tunica intima - innermost layer - simple squamous endothelium
  2. Tunica Media (largest in arteries)  - circularly arranged smooth muscle fibers - VC and VD
  3. Tunica Externa - Largest in veins  - collagen and elastic fibers that run longitudinally

                          

Term
Three types of Arteries
Definition
  1. Elastic
  2. Muscular
  3. Arteriols
Term

Elastic Arteries

Definition
  1. Largest arteries
  2. Conducting arteries beween heart and muscular arteries
  3. High elastin allows arteries to stretch - dampen surges and reduce bp from contractions
  4. Found in Aorta and many branches
Term
Muscular Arteries
Definition
  1. Distributing arteries - body organs and tissues
  2. this tunica media
  3. actively changes diameter of lumen to regulate amount of b/f to the tissues
  4. Brachial, coronary, inferior mesenteric
Term

Arterioles

Definition
  1. Smallest arteries
  2. Lead to the capillary beds
  3. Diameter regulated by local tissue factors and sympathetic nervous system
Term
Capillaries
Definition
  1. Functional units of the cardiovascular system
  2. Smallest vessels
  3. Capillary bed - network of capillaries that run throughout the body
  4. 3 types
Term

What are the three types of Capillaries

Definition
  1. Continuous - Most common - muscles, lungs, skin
  2. Fenestrated - small pores - Small intestine and kidney
  3. Sinusoid - Big holes - bone marrow, liver, spleen unbilical cord
Term
Where would you find continuous capillaries?
Definition
Muscle, skin, lungs
Term
Where would you find fenestrated capillaries?
Definition
Small intestine, Kidneys
Term
Where would you find sinusoids capillaries?
Definition
Bone marrow, spleen Liver
Term

Name two veins that carry oxygenated blood

Definition

Pulmonary vein

Unbilical cord

Term
Venules (3)
Definition
  1. Smallest veins
  2. Primary location of diapedesis - WBC leaving blood - b/c of low pressure
  3. Venules join to form veins
Term
In fetal circulation what is the ductus venosus?
Definition

Diverts blood from the liver to vena cava

Term
In fetal circulation what is Foramen Ovale
Definition
Diverts blood from the right atrium to the left atrium
Term
In fetal circulation what is ductus Arteriosus?
Definition
Diverts blood from the pulmonayr trunk to the aortic arch
Supporting users have an ad free experience!