Z-Disc
/ziː dɪsk/
The region or line formed by the joining of actin filaments in a muscle fiber; it marks the boundary of a sarcomere.
Zonula Adherens
/ˈzoʊnjʊlə ædˈhɪərənz/
A cell junction whose cytoplasmic face is linked to the actin cytoskeleton; important for maintaining tissue integrity.
Zygomatic Bone
/ˌzaɪɡəˈmætɪk boʊn/
The bone that forms the prominent part of the cheek and the outer side of the eye socket.
Zygote
/ˈzaɪɡoʊt/
A diploid cell resulting from the fusion of two haploid gametes; a fertilized ovum.
Zymogen
/ˈzaɪmədʒən/
An inactive substance which is converted into an enzyme when activated by another enzyme (e.g., pepsinogen).