2 Compound, tubulo-acinar, serous gland with many myoepithelial cells. Mucous cells also are present. 3 Tears drain through the lachrymal punctum via lachrymal canaliculi into the lachrymal sac. Then they pass via the nasolachrymal duct to the lateral side of the inferior meatus of the nose. 4 Tear fluid is chemically complex.
Tears have water, salts, glycoproteins, and bactericidal factors, e.g., lysozyme.
Tenon's CT capsule. 3 Adipose tissue. 4 Ciliary ganglion. 3 Superficial ectoderm over the optic vesicle thickens, then separates to become the lens vesicle . Meanwhile, the anterior wall of the optic vesicle invaginates into the posterior producing a two-layered cup that becomes the retina with its posterior pigment epithelium.