(B2) E1, Q3 anatomy

Lateral plate mesoderm splits into

Parietal and visceral mesoderm

intraembryonic cavity

Space between mesoderm layers

Splanchnopleure is formed from

Endoderm and visceral mesoderm

Splanchnopleure becomes future

Gut and gut derivatives

Somatopleure comes from

Ectoderm and parietal mesoderm

Somatopleure becomes future

Ventral body wall

Vitelline duct

Connection between yolk sac and foregut

Amnion grows eliminating

Chorionic cavity

Dorsal messers develops from

Splanchnic mesoderm

Primary bronchial buds become future

Main bronchi

Esophageal atresia

Defect in foregut partitioning

Tracheoesophageal fistula

Defect in tracheoesophageal septum

Congenital diaphragmatic hernia

Defect of pleuroperitoneal folds (they don’t close)

Pulmonary hypoplasia

Underdeveloped lungs

Respiratory distress syndrome

Premature babies, surfactant deficiency (type 2)

Septum transversum function and future

Separates thoracic from abdomen, future diaphragm

Pericardioperitoneal canals future

Pleural cavities

Pleuropericardial folds separates

Pleural cavity from mediastinal pleura

Pleuroperitoneal folds close

Pericardioperitoneal canals

Respiratory tract conducting portion

Specialized for transporting air

Respiratory tract respiratory portion

For gas exchange, includes bronchioles and alveoli

Mucociliary apparatus

Nasal traps, naso/oropharynx have lymphoid structures

Respiratory epithelium

Pseudostratified ciliated columnar

Clara cells are found

In bronchioles

Clara cells functions

Neutralize toxins, secrete surfactant, differentiate into other tissues

Type 1 pneumocytes

Squamous cells for gas exchange

Type 2 pneumocytes

Epithelial cells secrete surfactant

Goblet cells function

Produce mucus

Alveolar macrophages function

Cleanup unwanted debris

Where do you find pneumocytes

Alveoli

Neuroendocrine cells functions

Secrete serotonin that regulates mucus production and cilia motility

Basal cells

Multipotent

Lung stages mnemonic

Every pro can sac Aaron