Title: Frontal section of head
Stain Azan, pig fetus. The fetal conchae develop like a branched gland (1) within the blue-stained trabecular bone (2) of the future skull.
The fetal skin (3) is present at the top and bottom. Groups of cheek musculature (4) in middle left and right side.
A broad sleeve of chin muscles below (5). The developing external ear channels (6) are located within the blue trabecular bone
(at the level of conchae ).
Centrally the nasal septum (7) flanked by the symmetrical nasal chambers (8) in which protrude the turbinate cartilages (*, conchae).
At both sides of the nasal septum two cross-sections of paranasal sinuses are present (9) The oral cavity is bordered by the upper fetal maxillar bone (10) in which two upper molars (11, tooth sockets) are present. Two tooth sockets plus the two molars of the mandibular bone are visible below (12). In the middle a cross-section of the tongue (13, with glands at the bottom).
Title: Developing conchae in a frontal section of head
Stain Azan, pig fetus. At the upper half the nasal septum (7) as a lightly stained plate (cartilago septi nasi). Developing conchae with supporting hyaline cartilage scaffolds (*) (light-stained) are present in the nasal chamber (1) and known as inferior (lowest), middle and superior turbinates bones. The whole chamber is lined by a reddish stained epithelium (↓). At the lower bottom two cross-sections of paranasal sinuses (2) with the same type of lining epithelium and red-stained glands.
Blue-stained trabecular bone (3) of the fetal skull is well developed; note at the upper right part of the fetal skin with developing hair structures (4).
Keywords/Mesh: respiratory tract, fetus, head, nasal cavity, concha, turbinate, nasal septum, paranasal sinus, tongue, tooth, molar, hyaline cartilage, trabecular bone, histology, POJA collection