Chambers of the Heart Flashcards

1
Q

What does the right atrium receive deoxygenated blood from?

A

SVC, IVC and coronary veins

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2
Q

In anatomical position, what does right atrium form?

A

Right border of heart

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3
Q

What can interior surface of right atrium be divided into?

A

Rough and smooth –> sinus venarum and atrium proper

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4
Q

What are the rough and smooth parts of the right atrium separated by?

A

Muscular ridge –> Crista terminalis

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5
Q

What is the smooth part of the right atrium?

A
Sinus venarum (located posterior to Crista terminalis) 
- Receives blood from SVC and IVC
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6
Q

What is the sinus venarum derived from?

A

Embryonic sinus venosus (right horn that is absorbed by right atrial wall)

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7
Q

What is the rough part of the right atrium?

A

Atrium proper (anterior to crista terminalis)

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8
Q

What are the rough, muscular walls of the atrium proper formed by?

A

Pectinate muscles

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9
Q

What is the atrium proper derived from?

A

Primitive atrium

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10
Q

What separates the left and right atria?

A

Interatrial septum (solid muscular wall)

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11
Q

What is the small depression in the septal wall in the right atrium?

A

Fossa ovalis

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12
Q

Where doe the left atrium receive oxygenated blood from?

A

4 pulmonary veins

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13
Q

In the anatomical position, what does the left atrium form?

A

The posterior border of the heart

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14
Q

What can the interior surface of the left atrium be divided into?

A
  1. Inflow portion (smooth)

2. Outflow portion (rough)

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15
Q

Describe the inflow portion of the left atrium

A
  • Receives blood from pulmonary veins

- Surface is smooth and derived from pulmonary veins themselves

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16
Q

Describe the outflow portion of the left atrium

A
  • Located anteriorly
  • Includes left auricle
  • Lined by pectinate muscles (rough)
17
Q

Where is the outflow portion of the left atrium derived from?

A

Embryonic atrium

18
Q

In the anatomical position, what does the right ventricle form?

A

Majority of anterior border of the heart

19
Q

What can the right ventricle be divided into?

A

Inflow and outflow portion

20
Q

What is the inflow and outflow portion of the right ventricle separated by?

A

Muscular ridge (supraventricular crest)

21
Q

Describe the interior surface of inflow part of right ventricle

A

Covered by series of irregular muscular elevations called trabeculae carnae (sponge-like appearance)

22
Q

Where can the trabeculae carnae be found?

A

Inflow part of left and right ventricle

23
Q

What can trabeculae carnae be grouped into?

A
  1. Ridges
  2. Bridges (moderator band)
  3. Pillars (papillary muscles)
24
Q

What is the outflow portion of the right ventricle called?

A

Conus arteriosus

25
Q

Describe the conus arteriosus

A
  • Leading to the pulmonary artery
  • Located in superior aspect of ventricle
  • Smooth walls (no trabeculae carnae)
26
Q

Where is the conus arteriosus derived from?

A

Embryonic bulbus cordis

27
Q

In the anatomical position, what does the left ventricle form?

A

The apex of the heart, as well as the left and right diaphragmatic borders

28
Q

What can the left ventricle be separated into?

A

Inflow and outflow portion

29
Q

Describe the inflow portion of the left ventricle

A
  • Rough (lined by trabeculae carnae)

- 2 papillary muscles attached to cusps of mitral valve

30
Q

What is the outflow portion of the left ventricle called?

A

Aortic vestibule

31
Q

Describe the aortic vestibule

A
  • Leading to aorta

- Smooth wall (no trabeculae carnae)

32
Q

Where is the aortic vestibule derived from?

A

Embryonic bulbus cordis

33
Q

What is the sinus venarum?

A

Smooth (posterior) part of right atrium

34
Q

What is the atrium proper?

A

Rough (anterior) part of right atrium

35
Q

What is the aortic vestibule?

A

Smooth outflow part of left ventricle

36
Q

What is the conus arteriosus?

A

Smooth outflow part of right ventricle

37
Q

Where is the rough part of the left ventricle derived from?

A

Primitive ventricle

38
Q

Where is the rough part of the right ventricle derived from?

A

Primitive ventricle