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Unit 1 Bio 251 > Chapter 20 Heart > Flashcards

Chapter 20 Heart Flashcards

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Biology 101 flashcards
1
Q

How many times a day does the heart beat a day, and how much volumes does it pump?

A

100,000 times per day and about 8,00-liters of blood

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2
Q

What is the function of the atrium?

A

To collect blood then pump it to the ventricle.

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3
Q

What is the function of Ventricle?

A

Distribute the blood.

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4
Q

What volume of blood does the heart circulate per day?

A

8,000 L per day

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5
Q

How does deoxygenated blood return to the heart?

A

Systemic Circuit

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6
Q

How does Venous blood return to the heart? Via what? Into what structure?

A

Systemic Circuit, Via the Vena Cava into the Right Atrium.

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7
Q

How does oxygenated blood return to the heart? Via what? Into what structure?

A

Pulmonary Circuit, Via the 4 Pulmonary veins, into the Left Atrium

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8
Q

What structures are involved in the pulmonary circuit? (3)

A

Right Ventricle, Pulmonary Trunk, Left Atrium

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9
Q

How does the blood get from the heart to the lungs?

A

Right Ventricle Via the Pulmonary Trunk.

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10
Q

How does the Heart get blood to the other tissues than the lungs?

A

The left ventricle pumps blood to the systemic circuit Via the Aortia

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11
Q

Whats the ear-like extension of the atrium?

A

Auricle

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12
Q

Where is the Mediastinum located, and what is located there?

A

Center of the thoracic cavity, Heat is located there.

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13
Q

What is Coronary Sulcus?

A

The groove that marks the border between the atria and ventricles.

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14
Q

What are the Pectinate Muscles?

A

The muscle ridges that run along the surface of auricles of the atria.

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15
Q

What are the Bicuspid and Tricuspid valves connected to the Papillary muscle by?

A

The Chordae Tendinae

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16
Q

What do contractions of the Papillary Muscle do?

A

Prevent the AV valves from reversing into the atria.

17
Q

What would a rupture of the papillary muscle in the LV cause?

A

Mitral Valve Prolapse.

18
Q

What is the Pericardium?

A

A serous membrane that contains the parietal (outer) membrane and the visceral (Inner) layer

19
Q

What is the visceral layer of the pericardium called?

A

the Pericardium.

20
Q

What are the 3 layers of the heart wall?

A

The Epicardium, Myocardium, Endocardium

21
Q

What is they myocardium composed of?

A

Cardiac Muscle Tissue

22
Q

What are intercalated disks?

A

The disks that are found in the cardiac muscle tissue, they transfer action potential, ion currents, and force of contraction wall to wall.

23
Q

What is the endocardium composed of?

A

Simple Squamous tissue.

Unit 1 Bio 251 (3 decks)

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