Answer
Tissue folds are called gyri. The shallow grooves are called sulci.
The deep groove between the two cerebral hemispheres is called the longitudinal fissure.
The deep groove between the cerebrum and cerebellum is called transverse cerebral fissure.
Work Step by Step
Gyri are thick tissue folds in the cerebrum. Sulci are the shallow grooves. Fissures are another name for really deep grooves.
The deep groove between the two cerebral hemispheres is the longitudinal fissure because it follows the longitudinal plane.
The deep groove between the cerebrum and cerebellum is called the transverse cerebral fissure because it follows the transverse plane.