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22 Μαρ 2023 · Elastic fibres are present in all lung tissues. They are very important as they enable the lung to stretch and recoil. This ability to recoil is what makes expiration a passive process. Cross-section of capillaries – light micrograph. Structures & Functions in the Gas Exchange System Table. Structure of the trachea.
Each cell subset within the airway epithelium plays its part, and when impaired, may contribute to the development of respiratory disease. Here we highlight recent advances regarding the cellular...
30 Ιουλ 2022 · The alveolar wall consists of three major cell types: type I alveolar cells, type II alveolar cells, and alveolar macrophages. A type I alveolar cell is a squamous epithelial cell of the alveoli, which constitute up to 97 percent of the alveolar surface area.
1 Μαΐ 2023 · The conducting portion provides the pathway for the movement and conditioning of the air entering the lung. Specialized cells collaborate to warm, moisturize, and remove particles that enter. These cells are the respiratory epithelium and comprise the entire respiratory tree.
Explain relationships between respiratory structure and function in generalized aquatic and terrestrial animal systems. Two important aspects of gas exchange in the lung are ventilation and perfusion. Ventilation is the movement of air into and out of the lungs, and perfusion is the flow of blood in the pulmonary capillaries.
30 Οκτ 2023 · The term alveolus (singular) refers to a hollow cavity, basin or bowl in latin. Consequently, there are different types of alveoli (plural) found throughout the human body. However, alveoli are most often used to describe the small air sacs of the lungs of mammals, and are therefore known more specifically as the pulmonary alveoli.
24 Ιαν 2024 · The lower respiratory tract includes the segment of the larynx inferior to the vocal cords, the trachea, lungs, bronchi and bronchioles. Here, we will describe the microscopic appearance of the trachea and lungs.
