- Pulmonary circult

- Systemic circult

- Carries oxygen- Poor blood form the heart to the lungs and returns oxygen-rich blood to the heart

- Pulmonary arteries- Transports blood away from the heart.

- Capillaries- Interconnect arterles and veins.

- Pulmonary veins- Carry blood to the heart.

-Delivers oxygen- Rich blood to the tissues and returns ocygen-poor blood to the heart.

Arteries, capillaries and veins.

Approximately how many times does the heart beat a day?

Who much blood does your heart pump in a year?

100,000 times.

1.5 million gallons of blood.

Pericardial Cavity.

Situated in the mediastinum between the pleural cavlties.

What surrounds the outer line of the heart?

What makes up the external anatomy of the pericardium?

- Serous membrane lining the pericardial cavity.

- What makes up the external anatomy of the pericardium:

- Parietal pericardium

- Visceral pericardium

- Pericardial cavity

It is the outters most layer of the serous membrane lining.

- Reinforced by an outer layer of dense, irregular connective tissue.

It is the intermost surface of the two membranes that surrounds the heart.

- Epicardium

- Between the parietal and visceral surfaces.

- Contains 10-20 mL of pericardial fluid- acts as a lubricant.

- Superior vina cava

- Inferior vina cava

- Pulmonary veins

- Aorta

- Epicardium

- Myocardium

- Endocardium

- The outermost layer of the heart wall.

- Visceral pericardium.

- Multiple, interlocking lahers of cardiac muscle.

- Associated connective (collagen and elastic fibers), blood vessels, and nerves.

- Simple squamous epithelium supported bu areolar connective tissue.

- Continuous with the endothelium of blood vessels.

- Cardiac muscle cells are interconnected by speciallzed junctions- Intercalated discs

- Involuntary- Pace can be changed through autonomic nervous sustem activity.

- Circulatory supply is more extensive

- Connected by gap junctions

- Totally dependent on aerobic respiration for energy supply.

Receives oxygen- Poor venous blood form the systemic circult.

-- Superior vena cava

-- Inferior vina cava

-- Coronary sinus

-Interaltrial septum

--Foramen ovale 

Head, neck, upper limbs, chest.

Permits blood flow form the right atrium  to the left atrium.

- Closed 48 hours after birth

- Fossa ovalis

- Right atrivenricular valve (Tricuspld valve).

-- 3 fibrous flaps (cusps)

-Chordea tendiease

- Papillaru muscle

- Pulmonary semilunar valve

--3 semilunar cusps

- Bundles of collagen fibers.

- Limit cusps movement, precents backflow of blood.

- Four pulmonary veins bring oxygen-rich blood to the left artrium.

- Left atrioventricular valve (Bicuspid valve or Mitral valve) 

-- 2 fibrous cusps

- The thickest wall of any chamber

- Pumps blood through the systemic circuit 

- 2 large papillary muscles where the chordae tendineae.

- Aortic semilunar valve.

-- Prevents the backflow of blood into the left ventricle.

- Interventricular septum.

1) Superior/ inferior vena cava

2) Right atrium

-Tricuspid

3) Right ventricle

- Pulmonary semilunar

4) Pulmonary artery

5) Lungs

-Capillaries give the blood Oxygen.

6) Pulmonary vein

7) Left atrium

- Bicuspid

8) Left ventricle

-Aortic semilunar

9) Aorta

10) Body and then back to the Superior/ inferior vena caca.

- Originates at the base of the ascending aorta.

- Supplies blood to the:

-- Right atrium and ventricle.

-- Portion of the left centricle

-- Portions of the conducting system

-- Interatrial septum

- Origomates at the vase of the ascending aorta

- Supplies blood to the:

-- Left ventricle

-- Left atrium

-- Intervntricular septum

- Branches 

--Left anterior descending (LAD)

---ANterior interventricular branch

--Left circumflex- posterior surface of the heart.

- Two

--Great and middle cardiac veins

-- Coronary sinus

What does the great and middle cardiac veins do?

- Collect blood form the smaller veins and deliver it ot the corinary sinus.

- In the posterior surface

- Dralns into the right atrium inferior to the opening of the inferior vena cava.

What is the elctrical conduction system of the heart.

- Distribute the contractile stimulus to the mycardium.

- Sinoatrail (SA) Node 

-- Lovcated  in the right atrium.

- Atrioventricular (AV) node

- Bundle of his 

- Right and left bundle branches 

- Pukinje Fibers