Endo means within
Endo- is a combining form meaning within, and exo- is a combining form meaning without.
Theca- is the medical terminology combining form meaning sheath. For instance, the spinal cord has a theca, and intrathecal injections can be made within it.
Ventricul- is the medical terminology combining form meaning ventricles. It applies to both brain and heart ventricles.
-scopy is the medical terminology form meaning process of viewing within the body. Examples are colonoscopy and endoscopy.
the combining form end- means within or internal.
Intestines are called intestines in medical terms. The medical terminology combining form meaning intestines is entero-
Extra- is the opposite of intra-. For instance, intracellular means within the cell, and extracellelular means outside the cell.
The medical terminology combining form -ory typically refers to "pertaining to" or "related to." It is often used in the naming of structures, conditions, or processes within the body.
Prostatovesicular means pertaining to the bladder and prostate.
The combining word meaning sinus or cavity is "sinus/o." This prefix is often used in medical terminology to refer to various anatomical sinuses or cavities within the body, such as the paranasal sinuses. It helps in forming terms related to conditions or procedures involving these spaces.
The medical terminology combining form -eal refers to something "pertaining to" or "relating to" a specific body part or condition. It is commonly used to form terms to describe the location, structure, or function of a particular area within the body.
Patho- is the combining form meaning disease, and -genesis means origin. So pathogenesis is the term meaning origin of disease.