Thoracic Cavity Development

Front 1

what is the primordium of embryonic body cavities

Back 1

intraembryonic coelom

Front 2

when does the intraembryonic coelom develop

Back 2

4th week

Front 3

what does the crainial end of the intraembryonic coelom develop into?

Back 3

pericardial cavity

Front 4

where do the future pleural & peritoneal cavities develop from?

Back 4

caudal limbs that fold and unite ventrally

Front 5

what is mesentery?

Back 5

a double layer of peritoneum that extends from the posterior abdominal wall

Front 6

how are blood vessels, nerves, & lymphatics brought to organs?

Back 6

via dorsal & ventral mesentery

Front 7

this mesentery remains attached to caudal part of the foregut

Back 7

ventral mesentery

Front 8

mesentery that covers the body wall

Back 8

parietal peritoneum

Front 9

mesentery that covers the organs

Back 9

visceral peritoneum

Front 10

where are the pericardiopertioneal canals located?

Back 10

lateral to the foregut & dorsal to the septum transversum

Front 11

what does the foregut become

Back 11

esophagus

Front 12

what does the septum transversum become?

Back 12

central tendon of the diaphragm

Front 13

what are cranial ridges of the pericarioperitoneal canals

Back 13

pleuropericardial folds

Front 14

what are caudal ridges of the pericardioperitoneal canals

Back 14

pleuroperitoneal folds

Front 15

where are cranial ridges located?

what do they separate?

Back 15

located superior to developing lungs

separate pleural cavities from pericadial cavities

Front 16

where are caudal ridges located?

what do they separate?

Back 16

located inferior to developing lungs

separate pleural from peritoneal cavities

Front 17

what does enlargement of the pleuropericardial folds form?

Back 17

the partition that separates the pleural from the pericardial cavities

Front 18

what do the common cardinal veins drain? where are they?

Back 18

drain the primordial venous system into the sinus venosus of the primordial heart

located in the pleuropericardial membranes

Front 19

what contains the phrenic nerve?

Back 19

fibrous pericardium (pleuropericardial membrane) on the inner layer of the mesenchyme surrounding the pleural cavity

Front 20

when do the pleuropericardial membranes fuse?

Back 20

7th week

Front 21

what membranes fuse to form the primordial mediastinum?

Back 21

pleuropericardial membranes & ventral mesenchyme

Front 22

what does the primordial mediastinum contain?

Back 22

all the organs except the lungs & pleura

Front 23

enlargement of the pleuroperitoneal folds becomes______________________

Back 23

the partition that separates the pleural from the peritoneal cavities

Front 24

what develops from:
septum transversum
pleuroperitoneal membranes
dorsal mesentery of the esophagus
muscular ingrowth from lateral body walls

Back 24

the diaphragm

Front 25

how does the diaphragm receive its innervation?

Back 25

from myoblasts migrating into pleuroperitoneal membranes from 3-5 cervical myotomes

Front 26

what is the difference between the embryonic diaphragm nerves & the adult ones?

Back 26

embryo: the nerves pierce the pleuropericardial membranes

adult: nerves located on fibrous pericardium

Front 27

where is the suprasternal (jugular) notch - spinal level

Back 27

T2-T3

Front 28

at what spinal level is the sternal angle of Louis located?

Back 28

T4-T5

Front 29

what makes up the sternal angle of louis?

Back 29

manubriosternal join & costal cartilage of 2nd rib

Front 30

what is the vertebral level of the xiphoid process?

Back 30

T9-T10

Front 31

when does the xiphoid process ossify?

Back 31

40 y/o

Front 32

what is the spinal level of the root of the spine of scapula?

Back 32

vertebral level T4
spine of T3

Front 33

where is the inferior angle of the scapula

Back 33

vertebral level T8
spine of T7
overlies rib 7 & points to 8

Front 34

name the 3 walss of the thoracic cavity?

Back 34

thoracic inlet
thoracic outlet
sternal region

Front 35

where is the thoracic inlet located?

Back 35

body of T1
1st pair of ribs
superior end of manubrium

Front 36

where is the thoracic outlet located?

Back 36

xiphisternal joint
12 ribs and costochonral junction
thoracic diaphragm

Front 37

where is the sternal region located?

Back 37

sternum
clavicular & chondral attachments to sternum

Front 38

where are the costovertebral joints?

Back 38

head of rib & vertebral body at and above its level

Front 39

where are the costotransverse joints?

Back 39

tubercle of rib and transverse process of vertebra

Front 40

which ribs are the true ribs?

Back 40

ribs 1-7

Front 41

which ribs are the false ribs?

which ribs are floating?

Back 41

false: 8-12

floating: 11-12

Front 42

name the four anatomical parts of a rib

Back 42

head, tubercle, shaft, costal groove

Front 43

what houses the intercostal neurovascular bundles?

Back 43

costal grooves of ribs

Front 44

which rib joint lacks movement?

Back 44

costochondral

Front 45

what type of joint is the sternocostal joint?

Back 45

1st rib - cartilaginous joint
the rest - synovial plane-type joints

Front 46

name the parts of the sternum (including its joints)

Back 46

manubrium, body, xiphoid process,

sternoclavicular, manubriosternal, xiphisternal joints

Front 47

where is the breast located?

Back 47

in the superficial fascia

Front 48

what are the components of the breast?

Back 48

areola, nipple, 20 glands

Front 49

what type of ducts open onto the nipple

Back 49

lactiferous ducts

Front 50

how does the future pericardial cavity develop?

Back 50

embryo undergoes the head-fold, bringing the pericardium & heart ventrocaudally to take its position anterior to the foregut

Front 51

what does the gut tube endoderm become?

Back 51

glands

Front 52

what does gut tube mesoderm become?

Back 52

lungs & organs

Front 53

how are intestines formed?

Back 53

they are formed outside the body then pulled back in thru umbillicus

Front 54

what happens if the intestines are not pulled back through the umbillicus

Back 54

umbillical hernia

Front 55

why does the dorsal mesentery remain?

Back 55

b/c its the way to get blood vessels out to the gut's organs