Histology Guide

virtual histology laboratory

Chapter 17 - Respiratory System

The respiratory system is a series of organs responsible for taking in oxygen and expelling carbon dioxide.

Nasal and Oral Cavity

MH 134 Nasal Conchae and Palate

(nasal cavity, hard, and soft plates)


The epiglottis is a flap that extends from the upper part of the larynx. It aids in closing the air conduction passageway during swallowing.

MH 038-039 Epiglottis

(H&E / Verhoeff)


The larynx is a tube-shaped organ in the neck that contains the vocal cords.

MH 135 Larynx


The trachea is a fibromuscular tube supported by hyaline cartilage that connects the pharynx and the larynx.

MH 110 Trachea and Esophagus

MH 136 Trachea

MHS 222 Trachea

Adult Lung

The adult lungs are sponge-like organs and make up most of the lower-respiratory tract. Their most important function is providing oxygen and removing carbon dioxide from red blood cells within capillaries.

MH 138 Lung

MH 139 Lung

MHS 205 Lung

Lung Fetal

The fetal lung is not capable of supporting respiration.

MH 137 Lung Fetal