Common tendinous ring
a fibrous ring that surrounds the optic canal and the medial part of the superior orbital fissure; it gives origin to the four rectus muscles of the eye and is partially fused with the sheath of the optic nerve.
Synonym: annulus tendineus communis, Zinn’s ligament, Zinn’s ring, Zinn’s tendon.
The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..
Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..
The sequence of amino acids determines the type of protein. Protein is synthesized according to the sequence of nucleoti..
Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..
If New Zealand has lots of unique animals, it's also got a whole lot of unique plants. Find out more about some of them,..
Nutrients in the soil are essential to the proper growth of a land plant. This tutorial deals with the properties of soi..