The inner membrane of mitochondria possess finger like projections called cristae. Cristae bear racket or club-shaped structures called oxisomes or $F_{1}$-particles. Each oxisome has a spherical head subtended by a stalk and a base ($F_{0}$).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.