Lecture 12: Lungs & Mediastinum

Question 1

Mediastinum contains

Answer 1

the heart and pericardium

Question 2

Mediastinum

Answer 2

-central compartment of the thoracic cavity
-contains thoracic viscera outside of the lungs

Question 3

what is the mediastinum bordered laterally by

Answer 3

the lungs & pleural cavities

Question 4

what is the mediastinum bordered anteriorly by

Answer 4

the sternum

Question 5

what is the emdiastinum bordered inferiorly by

Answer 5

the diaphragm

Question 6

what is the mediastinum bordered posteriorly by?

Answer 6

the thoracic vertebral column

Question 7

divisions of the mediastinum

Answer 7

superior and inferior

Question 8

superior mediastinum

Answer 8

-viscera: superior portions of the espohagus and trachea

-vessels: arch of aorta & branches, SVC & brachiocephalic veins.

Question 9

3 regions of inferior mediastinum

Answer 9

anterior, middle and posterior mediastinum

Question 10

Anterior mediastinum

Answer 10

-between sternum and heart
-contains thymus gland

Question 11

middle mediastinum

Answer 11

-contains the heart and roots of the great vessels

Question 12

posterior mediastinum

Answer 12

-between the heart and vertebral column
-contains the thoracic aorta, inferior espohagus, azygous system

Question 13

thymus gland

Answer 13

-lymphoid organ
-important site of white blood cell maturation
-hormone production

Question 14

Conducting portion of respiratory system

Answer 14

*passage of air

-nasal cavity
-pharynx
-larynx
-trachea
-primary bronchi
-secondary bronchi
-tertiary bronchi
-bronchioles
-terminal bronchioles

Question 15

trachea bifurcates where

Answer 15

carina

Question 16

which muscle controls diameter of trachea

Answer 16

trachealis muscle

Question 17

trachea bifurcates into

Answer 17

L & R primary bronchi

Question 18

R primary bronchus branches into

Answer 18

3 lobar bronchi

Question 19

L primary bronchus branches into

Answer 19

2 lobar bronchi

Question 20

lobar bronchi branch into

Answer 20

tertiary bronchi (9-10 for each lung)

Question 21

each tertiary bronchi supplies

Answer 21

a bronchipulmonary segment

Question 22

what sits underneath right lung

Answer 22

liver

Question 23

what sits underneath left lung

Answer 23

heart

Question 24

which lung has th cardiac notch

Answer 24

left

Question 25

right lung (lobes and fissure)

Answer 25

-oblique and horizontal fissure
-superior, middle and inferior lobes

Question 26

left lung (lobes and fissure)

Answer 26

-superior and inferior lobe
-only oblique fissure

Question 27

where do vessels enter the lung

Answer 27

hilia

Question 28

pariteal pleural

Answer 28

covers the inner surface of the thoracic wall and extends over diaphragm and mediastinum

Question 29

visceral pleura

Answer 29

covers the outer surfaces of the lungs; extends into the fissures between lobes

Question 30

Respiratory portion

Answer 30

**gas exchange occurs

1. respiratroy bronchioles
2. alveolar ducts
3. alveoli & alveolar sacs