Outer layer surrounding mammalian oocytes.

Clear central zone in oocytes.

Transparent partitions between biological cells.

(also known by common names pepper elder, shining bush plant, crab claw herb, and man to man) an annual, shallow-rooted herb, usually growing to a height of about 15 to 45 cm (6 to 18 inches), it is characterized by succulent stems, shiny, heart-shaped, fleshy leaves and tiny, dot-like seeds attached to several fruiting spikes.