EduNinjaThe trachea of the gas exchange system branches into two airways, each of which enters a lung.
Fig. 1.1 is a photomicrograph of a section through part of the trachea.
Fig. 1.1
Identify structure X in Fig. 1.1 and outline the features that helped your identification. structure X=
Fig. 3.1 is a photomicrograph of a section through lung tissue.
Fig. 3.1
Identify the structure labelled J in Fig. 3.1.
State the evidence visible in Fig. 3.1 that supports your answer.
Fig. 4.1 is a scanning electron micrograph showing the tissue that lines the bronchi in the gas exchange system.
Fig. 4.2 is a transmission electron micrograph of a horizontal section made at the position indicated by the two arrows in Fig. 4.1.
Fig. 4.1
Fig. 4.2
Name the cells labelled A and B in Fig. 4.1.
A
B
The diagram shows a magnified section of part of the lungs containing specialised tissues.
Which row is correct for structures labelled 1 to 6 ?
carbonic anhydrase
ions
lysosomes
1
3
4
2
4
5
3
5
6
4
6
1
The photomicrograph shows part of the lung as seen using a light microscope.
Which row correctly identifies the features labelled 1,2 and 3 ?
1
2
3
alveolus
capillary
bronchiole
alveolus
bronchiole
capillary
bronchiole
small artery
alveolus
small artery
bronchiole
alveolus
The image shown is a photomicrograph of a transverse section of part of the gas exchange system.
What describes the image?
a thin inner layer of ciliated epithelial cells on top of a layer containing cartilage, supported by elastic fibres
a very thin epithelial lining with walls containing elastic fibres, surrounded by many blood vessels
an inner layer of ciliated epithelial and goblet cells on top of elastic fibres, supported by an outer layer consisting of cartilage
an inner layer of ciliated epithelial and goblet cells on top of loose tissue with mucous glands, supported by a continuous ring of cartilage
The photomicrograph shows a section through part of the human gas exchange system.
Which structure is shown?
alveolus
bronchiole
bronchus
trachea
The photomicrograph shows a section through lung tissue.
Which structures are present in this photomicrograph?
